As of this morning, you can reserve at the Westin Pittsburgh Convention Center for Anthrocon 2008 (Omni William Penn reservations to come).

Read the instructions carefully! Note that a non-refundable deposit for your first room night will be charged to your credit card approximately 62 days before the convention (typically around April 25).

If you want to know why these measures were necessary, read the background here.

Edit to Add: It has been noted that the Anthrocon pages are experiencing high traffic (funny thing, that) and therefore might be running a bit slow. Also, I found that the Westin’s reservation page barfed when I tried to reserve with FireFox, but it worked OK with IE.