MySQL move complete
The MySQL move is complete and (as far as I can tell) problem-free. Total database downtime was about 30 minutes.
I updated the /etc/hosts files on all the hosting servers to use the new IP address, so any scripts at cornerhost should already be connecting directly to lithium.
If you're set up to access MySQL from outside my network, mercury is working as a proxy server and will tunnel your requests to the new machine.
One minor issue acffects people who have specifically requested access to MySQL from a fixed IP address oustside cornerhos:
I think everyone who has access from a specific IP address also has access from mercury, but just in case I missed someone... If you get a permission denied error accessing from home, the fix is to add a line to your hosts file that looks like this:66.139.78.174 db.sabren.comThe host file is in /etc/hosts on unixlike systems, and in various places for various win32s. Google suggests this page if you need to hunt down the proper directory.
If anyone has any *other* database problems, please let me know ASAP!