Just wanted to share a cool study resource with anybody getting ready for the upcoming written exams. This site helped me a bit with the written RPR a few months ago:
http://grammar.ccc.commnet.edu/GRAMMAR/quiz_list.htm
Covers just about every part of grammar, punctuation, sound-alikes and easily confused words, as well as general vocabulary with 174 interactive quizzes.
Hope somebody out there finds it useful :O
-Mike