Oh yeah, Comcast has already added Sci-Fi HD and Animal Planet HD in a number of markets, but for folks in and around Boston, Massachusetts, they were still scraping by without. Buck up, you Bostonians -- as of today, Comcast has slipped the aforementioned channels into your HD lineup, though we've no idea if it plans on plugging in a few more as it has done elsewhere recently. Fingers crossed!

[Thanks to everyone who sent this in]

For the second time in the span of a week, Time Warner Cable is upping the HD ante down in South Central Texas. Shortly after subscribers in the area received Weather Channel HD and FOX Business HD, along comes word that TLC HD, The Science Channel HD and Animal Planet HD have now surfaced on the EPG. If our abacus is operating correctly, we're counting 45 high-definition channels for you folks now. Got any to you wouldn't mind loaning out? [Disclosure: Engadget is part of the Time Warner family]

[Thanks, Cephalexin]

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.]

It is the season to give, you know, and while we've heard that Comcast will be on the receiving end of things when it hikes rates in 2008, at least users across the nation are receiving a boost in their HD lineup before having the family over this holiday season. Up next on Comcast's list is St. Paul / Minneapolis, Minnesota (and western Wisconsin), which is receiving 11 new channels to complement the 22 already available. Among the newcomers are CNN HD, Animal Planet HD, Discovery HD, Food HD, Sci-Fi HD, TLC HD, Universal HD, USA HD, TBS HD, History HD and FSN North HD. Reportedly, customers in the area are already able to view USA, Sci-Fi, Universal and Food, and the rest of the gang is slated to go live on or before December 17th.

[Thanks, Ed]

Over a year after Insight Communications launched its InsightDigital 2.0 service and threw in a trio of HD channels to boot, the cable company is now giving its loyal customers five more high-definition options along with the Digital 3.0 upgrade. Reportedly, users can now tune into Discovery, Animal Planet, The Learning Channel (TLC), TBS, National Geographic and yes, even the NFL Network in glorious HD. The Digital 3.0 package will automatically be available to digital subscribers at no extra cost, but it should be noted that Insight will raise prices in January. Additionally, the operator has nearly doubled its on-demand library and includes VOD channels for HOB, Starz, Showtime, Cinemax and The Movie Channel, but we're still left with no word on any HD VOD plans.

You know times are good when we are surprised when it is more than a week between new HD channel announcements. This week we have a few more channels for you, but not as many of details as we would like on any of them. Discovery will be launching what they are calling four new channels, but one of them is an HD simulcast of the Discovery channel. We're not sure if this will replace the Discovery HD Theater that we have all come to love, or just add even more HD content, but they will also be launching HD simulcast versions of TLC, Animal Planet and The Science Channel. These new channels from Discovery will be carried at launch by at least DirecTV this September. Also mentioned in the press release as coming this year is CNBC and Chiller (who?). While it is still questionable if DirecTV will carry 100 HD National channel this year, -- at least without counting sports packages -- this will certainly be remember as a big year in the transition of cable TV channels to HD. A full list of the channels announced to date after the break.