The logotype for stackoverflow (and other Lo(W)J sites) is all lower case and uses boldface to separate the words, and that's easy enough to do if you can be bothered with the HTML tags.
But what if you're in a hurry, or talking about stackoverflow on a site which doesn't support HTML editing in user-generated content? Is there a preferred way of typing the names of the sites?
I've noticed Jeff and Joel use "Stack Overflow" (normal English spacing/capitalisation) so this appears to be "official", but the Fog Creek site uses "StackOverflow", as do other users along with "Stack overflow", "stackOverflow" and just "SO" (only really works on SO itself or meta)
So, what's your preferred way of referring to the sites in the Lo(W)J when all you've got is caps, punctuation and spaces?
(For bonus points, watch Jeff "RegEx Boy" Atwood optimize my title!)