Apple released Mac OS 10.6, aka Snow Leopard today. The big question is whether to run out and get a copy to install over the weekend.
The corollary question is whether I want to have to go out and upgrade all my applications this weekend and spend the weekend backing up, installing and debugging. With Snow Leopard's push to be 64 bit, along with other changes, some applications and support software (printer/scanner) drivers will require updates (http://snowleopard.wikidot.com/). While a number are already documented, there are probably a few gotchas to come.
That said, I will upgrade to Snow Leopard--most likely in the next few weeks. I think I will wait a week or so to see if there is any major fallout before I do.
This is not a bad reflection on Apple/Mac, I just want other to work out a few of the major issues. This comes from someone that is still running Windows XP on my PC Virtual Machines. With windows, you usually wait until the first major service pack (or something other than Vista).