Here’s a great review of PicPosterous on The Unofficial Apple Weblog. Posterous is the really easy blogging service and PicPosterous is the companion iPhone app for photos and videos.
I’m using Posterous now because a) I can email anything to post@posterous.com and it will appear on my posterous blog and b) because it will automatically get posted to Hangout, flickr, twitter, and many other social networking sites.
It really doesn’t come any easier than this!