I'm not a big user of any of the P2P programs (I'm not that big on mp3s, and have more legit games than I can play right now, so I don't really need to pirate them), but by my experience, Bittorrent is a lot more effective than something like Kazaa.
With the Kazaa-type system, your entire HD (or whatever portion of it) is shared, and no one file seems to take priority over another. Now that'd be fine for most of us PGCers, as we'd have mostly PGC stuff in our shared folders, but when a common-type person comes along, they'd ask for a PGC video, we'd give it to them, and then their system would "pay it back" by giving some of their bootleg Metallica and porn to the great and flowing sea of people asking for bootleg Metallica and porn. PGC gets nothing out of the contribution (aside from maybe the incrementally easier access to you-know-what)
Bittorrent is very specific and focused. One file. That's it. The one you're asking for is the same one you're giving out in payment. It means that when you have something really popular, there's an availability explosion of it on BT, but once that's died off, it's dead. Getting older "niche" stuff on BT is half impossible, because nobody else is downloading it.
Personally, every time I've used BT for something popular (coughPGSMcough), I've seen download speeds that completely blow away anything I've seen anywhere else. Actually, the biggest complaint I've heard about Bittorrent is that it causes some people's computers to restart. Do you know why? Supposedly, if the download speed gets extreme enough, your computer (depending on a lot of factors) might "crap itself" and force a restart. People just never saw that happen before Bittorrent.
Anyways, I've got an obvious suggestion. How about the next time a video someone likes gets updated (PGC just keeps doing business as usual), one of the first people to download it (who knows how) gets to make a torrent, upload it to something like SuprNova, and post it here. As long as nobody changes the filename, anyone who downloads the video from PGC can automatically become a "seeder", so you don't have to worry about "racing anyone" to make a torrent. We'll see how it works out. If PGC's still doing what they're doing, then 56kers have nothing to worry about, and PGC's servers might get some relief.
The only real catch is that I'm not sure if we're allowed to do that. SuprNova is chock-full of all sorts of illegal stuff. So I don't know if we're actually allowed to even speak of them.