If you just swapped your nameservers over, it can take a little while to catch up. If you go to the main page of your domain, you'll see the dread bad_httpd error. That basically means our servers think you're on a different server than the one you're really on. It looks like your DNS changes propagated, though, so there's no reason they should be this silly.
I gave your config a kick and it seems to be working now.
For reference: http://wiki.dreamhost.com/Bad_httpd_conf
You can usually fix that yourself by saving (without makign any changes) that domain's setup