I like your list, but a lot of the uses are beyond the power of prestidigitation. For example, making a tiny person in a jar yelling "help me" is impossible, since that replicates an existing spell (minor image). Most of the "change" uses probably wouldn't work - change isn't not listed in the spell description, and many of the uses replicate other spells anyway (the 'fix a hole in a bucket' one replicates mending, for example).
To address a few things:
1) I used Tome of Blood for many of these ideas. I gathered a list from a number of different websites then compared them to the original spell and tome of blood. I discarded many player suggested uses.
2) If you go by RAW, the spell can't do anything. It states that you can't replicate an existing spell. Wish does anything. Therefore, this spell can do nothing. We just have to accept the spell is poorly worded and move on.
3) That one example of the smoke into the bottle is a number of different powers put together. A tiny voice that sounds unnatural and speaks a few words is not beyond this spell. Shaping smoke is not beyond this spell. Minor image is an illusion. This would be considered a transformation.
4) Mending fixes something for good. This changes the shape of something for an hour. I can put a hole in a coin, I can make a hole go away for an hour. (Assuming the bucket was only 8 ounces. Remember your size and weight limits here. I didn't say it would be a big bucket.) It might be better to say, I fix the hole in my scoop, since I'd need to have an object that was light enough to be effected.
Complicated chemical processes (evaporate the alcohol from a drink) are probably too advanced.
Actually, thought about this one at length. If I can control Smoke in the air, then I can control fluid floating inside another fluid, as long as the two can be seperated and are not undergoing a chemical reaction. Alcohol evaporates from liquid anyways. Alcohol is dissolved in water, not chemically interacting with water. This spell is only speeding up the process of evaporation. I could not seperate acid, since acid is in constant chemical reaction with water.
I was hesitent to include condensation, until a player of mine pointed out the process of collecting morning dew on plastic sheets as drinking water. All the spell is doing is speeding up a natural process.
I also believe one cannot lift liquid into the air. I believe that you could increase surface tension and gather it up into a small sphere in your hand, effectively using a combination of teleport (self only) and clean, then you could throw the liquid. You could force wine to flow back into a spilled glass. But liquid does not have enough cohesion to hold together once you lift it off a surface. Someone suggested you could lift 1 pound of lava then drop it on someone. I have no examples from any WotC sources, and I just have to draw the line at that. Dampen and Dry would not be worded the way they are if I could float a glob of water in the air.
The "Sketch" effects might not work. They replicate Silent Image.
Sketch is right from WotC Tome of Blood. I didn't write it. I assume they think it's different from silent image in that it is 1) Obviously fake, 2) only 1 square foot.
The "Trigger" effects replicate Mage Hand.
Lifting 1 pound replicates mage hand, yet THAT is right out of the player's handbook. Personally, I believe they should have combined the two and been done with it. That said, it's in the spell that you can generate movement for 1 pound of material. 1 pound of thrust in a small area is enough to trigger many different things. Not everything, but a crossbow would not be out of the question. A DM might rule some Crossbows have a tough trigger and some have a hair trigger, but it is still possible, given the parameter's of the spell.
One thing I wonder about Prestidigitation -- what kind of action is required to make the effects? Standard? Switft? Immediate? Free? The spell is unclear. A lot of your uses (some of the best ones, in my opinion) assume it's an immediate or free action. I guess it depends on the DM. I had one DM who really didn't like this spell, especially the "clean" effect. I was covered in acid, and he wouldn't let me clean it off, though splashing myself with ordinary water did the trick. His reason was that prestidigitation could have "no mechanical benefit."
Yes, the spell is very unclear. Take for example the saving throw: See Text. See Text? There is NOTHING in the text about saving throws! As it is written, there are no saving throws, no spell resistance. Yet, If I were to create a cloud of pink paint and try and splater you with it, I rather think you'd get a reflex save or something. Of course, if it allowed a reflex save, I could make it explosive. Once it was explosive, I could add fell drain, and other fun feats onto it.
In the end, everything I have offered is a Suggestion. I tried to limit it to what I felt was the most that could possibly be allowed. In the end, I think that one should not be using this to poison people, or anything more then what a stage magician could pull off. But Tome of Blood and the actual spell write up has some fairly broad sweeping statements that have rather odd results when taken to the logical conclusion.
The only rule of thumb I can suggest is run these by your DM. have him check off what he would and would not allow. I feel the point of this spell is to mess with the rubes. Green smoke dragons floating out of your pipe. Gathering shadows when you get angry. Salt falling from your finger tips when you get potatoes.
As it is written, it can do amazing things and nothing at all. So of any spell ever written, due to being so poorly written, it is almost entirely up to the whim of the individual DM.