Nokia USA is a total joke. It's run by a group that has a call center in India, which has the worst response time ever. They can't do pre-orders, or undo lockouts from the web site, or really do anything at all but be annoying. It would totally not surprise me if they're just getting to your email 6 months later.

If you'd like to read my initial experience with them on purchasing the N900 and you'll see how bad it can be. I had another run-in when I was trying to get an N900 on one of the many rebate offers, only to be snagged by following their directions, which turned out to be wrong, and resulted in me missing the chance to get in on the deal.