And if anyone does that, please be sure to return the courtesy of actually testing and reporting detailed and honest feedback. Don't just glom on get something for nothing.
I've just signed up for some betas, hopefully I get chosen.
I would happily give a Developer some beta testing time for the favour of registering my UDID so I can try out iOS 5 for myself. It'd be the least I could do, and it'd be pretty cool to actually get some pre-release apps and feel like I'm making a contribution to someones work.