Apparently, my server may not be back up for a couple days. A lot has been changed around in the networking code and the CraftBukkit folks need time to adapt. Additionally, there are a lot of bugs introduced with 1.5 so it's probably going to be a moving target as Mojang rolls out fixes.
It's times like this I wonder why Notch and company don't both working with groups like Bukkit to make these updates go more smoothly.
It wouldn't be that damn hard to just keep the lines of communication open and let modders have some idea what to expect.