If there's another thread answering this already, I apologize.  I looked into it a bit and couldn't find one.

I got myself whitelisted for SMP a few minutes ago and tried to log into the server, but every time I attempt to log in it tells me I need to be whitelisted.  I've given it about ten minutes, restarted Minecraft, and even rebooted my PC just for fun, and I can't seem to get in.  If there's a way to re-whitelist myself, I can't seem to find it.  Any help resolving this would be appreciated.