#7 - Nov. 1, 2010, 7:30 a.m.
If you are finding yourself repeatedly disconnected, I'd strongly urge trying a full reset of your interface and seeing if this repeats BEFORE adding in ANY addons.
To do a full reset UI, you will want to save your addons in another spot if you wish to preserve them.
Then rename/delete or move your WTF, Cache and Interface folders while WoW is shutdown. Reboot your system.
Note, if you are running Vista make sure your permissions are set so it does not undo your changes.
More detailed instructions for different operating systems, including Macs are here.
http://us.blizzard.com/support/article.xml?articleId=18761&searchQuery=reset%20UI&pageNumber=1 Most folks that find themselves disconnecting either have outdated addons, or didn't clear those three folders and chances that reside there can cause this - and lag.