We could certainly get used to hearing all these HD expansion stories, but the ones most excited about Comcast's latest additions are housed all around our nation's capital. According to tipster Casey, customers in and around Baltimore, Maryland and Northern Virginia are just now receiving six new high-definition channels: Discovery Channel HD, CNN HD, TLC HD, USA HD, Animal Planet HD, and yes, Sci-Fi HD, too. Interestingly, it's said that subscribers in Washington, D.C. have yet to see the newcomers, but feel free to toss a comment in below if that status changes.

[Thanks, Casey B.]