"I'm not a felon or underaged, but, as many freepers know, I'm not yet a U.S. citizen. I'm still in the immigration pipeline. But I'm really wondering, knowing the underhanded tricks of the DNC, is this. Did I get registered to vote without knowing about it?"
I know a lot about how these are done. Voter registration is public information. They would know if you are registered.
Either you are in some organization infested with Dim-crats (a teacher or professor?) and they assumed you are one of them, or they are now trawling for the 'pre-citizen' vote.
I wouldn't put it past them.
You forgot that some of the groups like Acorn actually register (And some people think vote) for people. Get their names out of phone books etc.
Type in "repository" in the FR search. We've kept a running account of such actions in "swing" states since the 2004 election.