OK I did some quick math, and assuming that BYC gets 100 new members a day, on average, it would take about 21.59 days or about 3 weeks from today to hit 35,000.....so considering that....I've gone through all 8 pages and wrote down all the guesses so I won't duplicate anyone's guess...I'll go with
BYC will have 35,000 members on June 24, 2009 (and I don't think anyone used that one yet!)