Another cool Blogger draft feature is the one I'm trying out right now, a new post editor. This one is based on the same technology as Google Docs, meaning a smoother experience and faster iterations in the future.
For me personally, one particularly nice thing is to be able to 'fix' the compose settings so that the editor doesn't try to interpret <b>angle brackets</b> <entry>of any kind</entry> as active markup. If you need to talk about XML and HTML, this is kinda important :). This is available under "Post Options".
We just released a bunch of updates for Blogger, including many draft features (see Update and Bug Fixes for June 26th). One draft feature which is particularly cool is inline comments. These will hopefully make it easier and faster to leave a comment. I've enabled it on this blog; there are a few usability issues remaining to be worked out but we're iterating on them as I type. Go Blogger team!