I tried to add a comment there with some blogs I subscribe to (some already mentioned, some not) but I suspect the spam filter thought I was nuts to try posting 20 links. So here are a few other blogs/feeds you might like, if you like Flowing Data and came here from there:
And del.icio.us, as ever, is indispensable for finding infoviz blogs.
Who have I missed? Let me know in the comments!