I've read so many allusions to who has which and had if first, could someone, who is pretty sure of there facts, give me a very quick rundown on when mpeg4 started on DBS? About the only thing I think I know for sure is that E* started with mpeg2 and now is making mpeg4 receivers and says all future HD will be mpeg4. And that 622 & 722 are the only HD DVRs at the moment that are mpeg4 able.

And the other thing that gets alluded to every once-in-a-while in lots of threads is how E* doesn't have enough transponder space to match the D* target of 100 HD channels. Can someone, who again is pretty sure of their facts, give me an idea (doesn't have to be accurate down to the nat's ass) of how much room on the three middle sat positions there is to actually add HD channels? And if your fingers aren't too tired, explain what the next sat will add.