Official blog for the Windows Live Digital Memories
Digital-photography-school.com is another good web site with practical tips on how to take better photos. You can subscribe to their blog to stay up to date when they post new articles.
Some recent gems:
I think that they strike a great balance with articles that can benefit both beginners, but also have value for intermediate and advanced photographers. The great thing about photography as a hobby is that no matter what skill level you're at, or what equipment you have, you can still have fun, and there's always more to learn. The digital photography school helps remind me of that!