I always find the most interesting sites when I’m supposed to be busy doing other things.
Acts of Volition is a site that discusses, in extraordinary detail, various aspects of the Semantic Web, W3C standards and various blogging issues. It’s a very nicely designed site and extremely well written – just wish it was on Blogwise already ;-).
I’ll be adding it to my list of sites shortly, alongside Dave2002 – an interesting blog written by David M., who regularly updates with posts reflecting his experience with setting up the site.