Thanks for your reply Will.
As of this morning, the site seems to be blazing along, but I'll keep monitoring it throughout the day. To answer some of your questions..
The site is winterbrood.com, and its currently just flat (placeholder) pages. The couple of pages up now are:
I noticed slow-down from my work PC during the afternoon on Wednesday (3/10) and in the evening from home (after 7). Dreamhost (main site, panel) and other dreamhost-hosted sites (I checked out some sites-of-the-month) loaded fine when I checked last night.
Again, it seems to be fine this morning. Maybe it was some freak performance issue yesterday.