I have a general rule that I don't read blogs that lack RSS feeds. That makes it a little embarrassing because PolkaDot doesn't provide an RSS feed.
So I added the functionality today. It's RSS 2.0. (Sorry ATOM and RDF fans, RSS is all you get. Mainly because I'm hand-coding it and RSS 2.0 is the simplest with which to deal.)
I'm not releasing the new code yet. I haven't really tested it out very well. But it does validate. And it works in FireFox's LiveBookmarks, Sage, and via NetVibes.