I forgot, how are we doing metamagic for the seeds?
We aren't, I think. Spells already have a lot of the benefits built into the base package - ie, fire damage is 2d6/point vs 1d6/point in Vancian. Plus, casters don't need the help.
These were the seeds I had on the to-do list before I decided to just press ahead:
Anti-Scrying (False Vision) - Illusion
Mud to X, Earthquake - Transmutation
Petrify/Turn to Ice - Transmutation
Grease/Sleet Storm - Conjuration
Telekinesis/Sphere - Evocation