I bumped the other GameFly thread, didn't really think to make a whole new topic.
As I said in the other thread though, I like the idea. There's definite lulls in new game releases where I end up keeping a game I've finished for far longer than I need to just because nothing new is coming out for me to send it back for. Movie rentals during that time are a perfect way to get some more value out of the sub.
I really hope they sell used blu-rays for as cheap as they do used games. This could be another solid avenue for cheap movies.