129 currently has two transponders (1 and 11) available for national HD channels, if E* chooses to use them. Transponder 1 was recently cleared of all channels and taken out of the tables (temporarily, we hope!). Transponder 11 currently has HD test channels up on it (no "available" channels). Both TP's are (or were) running 8PSK MPEG4, so each should be able to support about 6 national HD channels.
The only question is whether E*-5 has sufficient power to support those TPs at high enough power output to be viewable (in addition to what's already downlinked).
Brad