I'm not switching to the xbox 360 for two reasons:
1. I'm barely using my ps3 anyway, so I don't need to substitute it if I rarely use it anyway. (just the exclusives and the occasional round of Street Fighter). I might just as well go without it.
2. I don't own a 360. The exclusives don't really appeal to me (sorry to all the xbox-affectionados) and I'm not keen to pay 50 bucks yearly for a feature that I have been using for free for the past decade on other platforms, so I'm not going to buy one.
HOWEVER
I am considering some other options. Since the PSN security is as thick and sturdy as a sheet of toilet paper (all of our private information except CC-Data just in an unencrypted database, seriously???), I might stop using the PSN all-together and just use the PS3 for single-player only. Or I could go a step further and just stay on my preferred platform, the PC, alltogether.