The 2 80Gig drives have been done for a while. (well, at least a month).

Search for MadTivo's utility. It will allow you to replace your a drive with an 80Gig and add another 80 G at the same time.

Note: Must be done AT the same time, as you can't expand the MFS twice.

And YES, it does get slow. REAL damn slow. 12M of memory ain't much when dealing with that much program information. I speak from experience.

Personally, I just have two Tivo's with 30+80 on each. Record everything in BEST, and life is happy.