No, it's not going to work until the nameservers are fully propagated - there's nothing you (or anyone) can do to speed that up - that's just how the internet works. You can check on the link above and on this one to see what's going on:
http://www.whatsmydns.net/#A/OTAKUDOME.COM
That IP address is DreamHost.
But just to be sure - you went into your account at DH and changed those settings?