[edited by: fischermx at 10:37 pm (utc) on Oct. 6, 2005]
Is it a compliment when someone takes your .net/.org/.info
Without knowing the specifics, it's hard to say if the choice is a "compliment" or merely a coincidence. For instance, I was helping a client get a domain name for the client's homeowners' association. Turns out, there's another association in another state with the same name. We didn't "steal" "their" hoaname.org domain; it's just that they'd already taken hoaname.com, so the *.org was the closest they could get to what they wanted.
As long as you're the one getting the traffic, and since you've got the *.com, you should be fine. But don't be shy about checking into the other domains from time to time, to make sure they aren't pirating your content or anything. (No harm in being vigilant.)
Hope that helps a bit.
Eliz.