Online resource guru Charles Kelly has just uploaded a Flash-based quiz on the ii-adjectives marked as commonly used in EDICT as of 2006-07-14. Straightforward stuff - you are given an adjective in kanji/kana and you have to pick the correct meaning from 4 or 5 options (depends on which quiz you pick). I gave it a whirl, did 100 questions and got paddled - only 82% correct. A lot of sneaky bastard never-heard-in-conversation chaps like ねばりづよい and いちじるしい, which makes it perfect for people studying for JLPT 1kyu. English-日本語 quizzes too.