As expected, there's a ridiculous amount of panels planned for PAX Prime 2010 and all of the usual companies have a presence at the show. Basically, you'll need mad planning skills and an army of clones to see everything that's even mildly worth checking out.
First, the full schedule. Notice how even though you're scrolling furiously, the page continues to go on and on almost endlessly. Now, take a look at the exhibitor list/exhibition floor map, viewable here in .pdf form. Study it well!
The kind folks who put PAX together would also like to remind us that passes are almost gone. As it stands, only one-day passes for Sunday are still up for grabs. Even if you can't get into the actual show, hugs will be given, and good times will be had.