Hey, if you're keen on actually making disciplines, it may be worth your while to know that all of Appraise, Climb, Decipher Script, Handle Animal, Iaijutsu Focus, Lucid Dreaming, Open Lock, Psicraft, Speak Language, Use Magic Device and Use Psionic Device have not been used to make any complete disciplines, yet.
I think Appraise may have been covered by one, but if it's not on the list, I'd have to find it again (which I prolly won't try, since roughly half the listed disciplines came from me).
I've had some interesting ideas for an Open Lock-based one, as well as some Knowledge-based ones, but they'd all be pretty supernatural, which makes me feel like they would be ill-fitted for martial disciplines...
As for Iaijutsu Focus, I got a feat or something somewhere that lets you switch any skill check for a martial maneuver to Iaijutsu Focus instead, but only while your weapon is still sheathed (and it has Quick Draw as a prereq, of course), as well as allowing some additional effects.