Leo Laporte has posted in his blog that he is no longer with TechTV.
http://leo.typepad.com/tlr/2004/04/end_of_line.html
The channel was recently sold to Comcast who is going to turn it into a videogamers channel. No word yet on what the new name of the channel will be.
Leo
does have a radio gig with KFI-AM and you can hear him on the weekends. Not the same, but better than nothing
http://www.kfi640.com/main.html