For those of you who are out of the loop, there is a high chance of an update this Thursday for 1.2.4. It will most likely fix a lot of the SMP bugs everyone has been complaining about. Source: http://twitter.com/#!/jeb_/status/181674674751676417
I am ready to kill Mojang... I would have been fine and dandy without whatever upgrades. Good thing I didn't update
Bukkit does have a dev build out, but, well, that's dev... and you can never really trust those for stability Also, we'll have to wait for certain plugins to update, again.