I know exactly what's going on there... Our server hosts approximately 41 different domains, some of which get 100,000+ unique page views daily.. they've been diligently working on tweaking the performance to resolve this issue..
Seems like their tweaking is paying off as I don't believe there have been any issues over the past few days... (Correct me if I'm wrong here..)
Sorry for any inconvenience - I was frustrated right along with you, if that matters
