Ive been going through Tae Kim's grammer guide and find it to be superior to any other grammer guides Ive read. However, he only has practice problems up to past tense verbs. Is there any practice material out there that I can use to go along with Tae Kim's guide and is similar topic/format wise?

Not sure if this is what you want but there is a cloze deletion anki deck for tae kim available