I have to say I agree with Qui and Vanessa on the exclamation points of #2 with font of #3. Also, please make sure that the lovely graphic designer who did this pro bono for us gets some publicity in case any of us ever actually have some money to spend on such things.
Widening the circle of 'Opinion!' - where circle implies dialogue/roundtable/conversation. #2 for me.
Then #1, "we are here, I talk".
#3 for me does not imply either change or blogging for me?
For #2, the 2nd treatment also emphasizes "change" - the buzzword of 2009, already! A catch-phrase that made some 2 million micro-campaign-supporters cashed into, so I think we're very timely ;).