So, for the past 2 days I've been testing the site out on a virtual private server. And I must say, I'm extremely impressed. With the addition of the private resources, XCache, and some tweaking, the site is blazing fast. I haven't gotten a single error yet (knocks on wood ferociously). If this handles pressure like this, I will DEFINITELY be keeping my services here, especially with some high profile projects that will be hosted here just now in the planning stages.
I always had an amazing love of the new White House web site. Never did I realize it was powered with my favorite content management system! Here's a link to the article I just read that gives an in depth look at the project and some of the parties involved: via O'Reilly