I'm posting this from the Dashboard widget I mentioned below. It says I can make stuff bold or italicized using the standard keyboard shortcuts. Looks like I can. That's pretty cool. It doesn't appear to support OS X's spellchecker, though. Nuts to that.
In other news, the Gmail widget is rather large. So large, in fact, that there is plenty of room to show message bodies and/or compose in the widget itself. That is, there would be if Google had built it to allow those actions. But they didn't. I'll give it a few days, but I'm guessing it will be going away soon.
I'll probably keep the Blogger widget, though.