i'm a reasonably decent PHP coder.. I'm somewhat hesitant to make the switch to this software because of all my lovely B2 hacks. So in the short term I'm going to stick with my heavily hacked B2.
HOWEVER that doesn't mean I can't do features for WordPress. I've literally got tons of them. One I would like to do first is a subscription type hack for WP where by subscribers are notified of the updates to the blog (already have this at my website.. So if WP isn't radically different from B2 I can provide this hack pretty hassle free. Caveat however is that it requires a database of it's own.