Make sure and check out Bless You Boys -- the premier Detroit Tigers Fan Site. They have complete coverage of the Tigers and a fantastic, welcoming, and rabid community. http://www.blessyouboys.com/
MLB Daily Dish is looking for additional contributors! We're looking to fill several time slots throughout the week. If you can follow a large twitter/reader list, assimilate information, and spell (with a focus on SEO-friendly headlines), you might be a perfect fit. It's a great way to build experience, expand your network and exposure, and make a little cash on the side. Email me with recent writing samples and your availability if you're interested. -jbopp
The one that started it all -- Athletics Nation, the home for A's fans. Check out complete coverage of the A's, including news, analysis, and one of the best communities on the 'net.