Don't promise daily posts if you were hoping that the announcement will somehow be the source of motivation to fulfill said promise.
My problem is that whenever I sit down to write something, even if I have in my mind that it will only take a minute, I inevitably end up with a post the size of a short novel and am thus burned out from writing anything else.
So, be prepared for short, Twitter sized posts.
Can I link Twitter to my blog and my Facebook Status? Now that would be nifty.