FW 2.1 is very stable. Hold off until a jailbreak is ready. It should not be too long of a wait. Also, if you are doing any unlocking, you definitely need to hold off on the upgrade because your baseband may be upgraded to a version that cannot be unlocked. 3g SIM adapters may stop working as well. In general, do not upgrade yet! I will update the site with news when it’s a good time to upgrade.

Also, iTunes 8.0.2 is out now. I doubt this will make much difference either way, but ask yourself, why bother. Just because a new version is out doesn’t mean you want it. I would hold off on this also.