Yeah, I should have said "a weird problem related my server" ... it's not on the server itself, it's some sort of network problem. Check out the MRTG graph to see what I'm talking about...
<img src="http://satin.sensation.net.au/64.246.52.245_14-day.gif">
The two large spikes are rackshack doing local testing. As you can see, they worked as they were able to get above the magical 1.2Mbit/sec.
So why can't 50,000 surfers push it above that? Fuckin' weird.