James Dykes - a developer in the UK who I've been working with closely - has started a blog about his experiences using Team Foundation. He's actually done some of the most extensive Work Item Type customization I've seen so far - it's been impressive to watch.

His RSS feed is here: RSS

He also has a pretty good php for beginners web site that he works on during his spare time, but of course as a Microsoftie I probably can't endorse that kind of thing.... [;)]