I compiled the responses and decided to hold off the Meetup until September. I'm explaining my rationale here (and yes I recognize September is going to be super busy): http://hummingbird604.com/2008/08/22/vancouver-blogger-meetup-august-2008-and-september-2008/
I tried really hard to reach a compromise (as the number of people who wanted it and those who really didn't care or wanted to hold until September) was pretty much equal.
Thanks to everyone who voted, and as always, feel free to email me or send me a tweet if you have any questions, concerns, etc.
Warm regards to you all from sunny, non-cloudy, 30 oC Mexico.