Have you guys seen this site? http://www.baristaexchange.com/
Looks very similar to stackexchanges' site. For example, look at the header.
This seems confusing for our users. Is it also IP infringement?
It's a discussion board with the word "exchange" in its name. This isn't a discussion board, and we hardly have a monopoly on the word "exchange".
Also there are a crapload of ads on that thing, which should make it obvious pretty quickly that it's a whole different sort of party.
I don't think it'll be a problem.