If you'll recall, Comcast went out of its way to enhance the infrastructure and add a number of new HD channels to much of the Northeast late last year, and now it's finally time for South Florida to experience the same. Reportedly, a "major upgrade" is currently underway on Comcast's South Florida cable system, and we're told that said changes will provide a platform for DOCSIS 3.0 -- set to roll out in 2009 -- which will enable 100Mbps download speeds. Furthermore, subscribers throughout Miami-Dade, Broward and Monroe Counties can look forward to a new slate of HD VOD choices to go along with six new HD channels: Food Network HD (414), USA Network HD (420), History Channel HD (422), Discovery Channel HD (424), Animal Planet HD (426) and Sci-Fi HD (427). Best of all, those newcomers are only part of the "phase one" HD expansion plan -- go on, let those imaginations run wild.