Disclaimer: I know this is a developer version, but this is what I bumped in which isn’t good, for the moment (just for the record).
I blogged the last post from Flock. First of all, where do the tags go? It’s great to be able to feed in tags, but… can’t see them anywhere.
Second: it converted my HTML (the link) to > and < — not very nice. Third, I’d love to be able to choose categories. Oh, and I don’t need the <p> and <br /> tags around my post content. (Particularly not the <br /></p> bit.)
Other than that (and more positive, I really love the del.icio.us-star thingy).
Related: Blogging from Flock