I haven't received such a message, but from what you folks describe, it certainly sounds like spam. If it were someone we knew--well, it would be like vermaden sending me a message with his atheist slogan in the sig, and mean nothing.
Heatherval, if you get a private message from these forums, from someone you don't know, and it bothers you at all, send it on to the moderators. Better too careful than not careful enough these days.
(Which reminds me of some satire I saw somewhere, where the story is that the teenage girl goes to meet someone who is also supposedly a teenage girl but turns out to be a rabid grizzly bear. The moral was something like, "Who knew bears could type?"
User James, if you're not a spammer, I think you'd best post an expanation VERY quickly.