Man, I came so close to posting a warning when this site was about to migrate on
vB. You could of stretched your shared hosting account for quite a while on phpBB or other software.
vB is a resource intensive bandwidth hog. It's got plenty of options a geek (no pun intended) loves, but everything a hosting provider hates.
Some advice...get a managed dedicated box with lots of throughput AND if you can find one, a provider that has extensive knowledge of
vB because your problems are only beginning. The more people sign up, the more your server and
vB will have to be customized to deal with the traffic. If you want to save yourself a few headaches, don't go for the budget plans either. You should splurge on a powerful server and bandwidth ahead of time.
You could take a look at rackspace.com if phone support is important to you or venturesonline.com with better prices and email support.
vB sucks BIG TIME, sorry you had to find out