THis is a new device that might be a great match to the HD1K. HDHomeRun is a networked with dual ATSC HD TV tuners and compatible with VLC and MythTV. I suspect that it streams the MPEG2 transport stream over HTTP and provides some sort of HTTP server to accept channel change requests.
Only $170! (shipping real soon now)
http://www.9thtee.com/hdhomerun.htm
User Forum (brand new so not much info yet...)
http://www.silicondust.com/forum/viewforum.php?f=13
It seems MPLAY might have the basic guts to talk to this device and if The Endless and Marcelo3D were willing - this might pump (massive HD) life into our HD1K. If anyone is interested in pooling funds to buy one for the MPLAY dev team, I'll ante in with $25 (maybe more).