Chris does a great job with his Digital Photography Tip of the Week. He also has a Photo of the Day that you can see on his own site. But there are lots of other resources out there.
A good one is the The Digital Photography Weblog. This is part of the Weblogs Inc. network. It covers digital cameras, useful websites, books, and more.
Check it out at http://digitalphotography.weblogsinc.com/