I think semantic beats short if you have to resort to misspellings and alt TLDs.
Here's a freebie: sidetogether.com is available :-)
Haha! Most of the views we have been getting so far have come from other websites, not word of mouth, so it's presently not an issue. I totally agree with the .CO opinion, but we don't have a few thousand dollars to throw down on a domain, so we're sticking with the current one until we can potentially get access to the .COM.
In person, pretty often. I was describing it to some friends and it was a bit tricky! "Meeet with three E's."