Vaneras over on the WoW EU forums put up a post today listing Blizzard resources for WoW players when the patch drops tomorrow. While the post doesn't say "Patch 3.0.2 is tomorrow" it does have the title "10/13 Patch Day Paradise!" But the fact that 3.0.2 is dropping tomorrow isn't really anything new.
The Blizzard resources he provides includes an FAQ on connection and patching issues. Topic covered include being stuck on connecting, having problems with your firewall, game version validation, corrupt patch files, blizzard downloader issues (see our patch mirrors for a quick and easy solution to that), and general patching advice for your operating system of choice.
He also points out the technical support phone numbers (US EU), but usually the fastest solution is to post on the technical support forums (US EU) and you'll get a response very quickly from a fellow player or from a blue.
Thanks to Trevor for the scoop