Seriously, not much fun being a beta tester for Adobe.
You mean you don't like to constantly install and uninstall software that may or may not do what you need in a production environment? Or jumping through hoops to recreate/document the steps to reproduce the bugs that you triggered? Filing bug tracking software reports is fun, no? (useful ones, not "This doesn't work" reports) Regressing the bugs on all subsequent updates is fun too Or the best part .. when you install a piece of beta software that manages to muck up your system so badly you have to format and reinstall the whole setup and then reload all your data from backups to get life back to normal? Oooh the glamour of it all!
Seriously though, lots of people think "I'd like to beta test _____" ... it sounds glamorous to have early access to things and to help test, but having done a large amount of beta (and alpha) testing (not for adobe, but other large companies) I can say with certainty that Jeff is right ...
No, you DON'T want to be a beta tester .. not unless you really like the punishment, have a lot of free time on your hands to install/reinstall/uninstall/chase things down, love to be really frustrated when no one can reproduce the errors you can easily reproduce and have your bugs marked as invalid, spend lots of time to get yourself back to a working state ... and last but not least, never EVER test this stuff on a production machine! You will want to have some "extra" hardware around to do your testing with if you rely on your computer setup in any way/shape/form