Very cool! I think I missed four. :)

A couple of pedantic nits:

HistoryPress for 300, Bonus Question/Answer is wrong. WordPress is licensed under GPL, not specifically under GPL v2.0. That said, most of the time, the distinction is utterly irrelevant.

Also, HistoryPress for 100: where's the love for Mike Little? (As co-creator of WordPress, he would have made a far better Bonus Question here.