A man after my own heart, ultimate control of all he uses...
Hey bob, you have the UBB PHPAccelerator enabled? That could decrease some load... Additionally having ZendOptimizer running on your server could bust the load down a smidge more (ZendOptimizer will only speed up PHP pages, which the PHPAccelerator is)...
Shoot me an email sometime or somethin... james[at]virtualnightclub[dot]net