Dang, exeterdad, that's some serious throughput!
Well, it works in 5.8 Standard with SeaMonkey 1.1.3 and Java Plug-in 1.5.0_09. The funny thing is, I get better throughput on that, running inside vmware, than on the same browser running directly on the Windows host (though that has Java Plug-in 1.6.0_01, but it shouldn't make a difference, right?) ...
Download = 633.53 kbps
Upload = 76.41 kbps
VL in a vm:
Download = 1.124 Mbps
Upload = 185.52 kbps
NOTE: It's not a very scientific test, because azureus was running, but the speeds on it were pretty similar during both tests and they were performed within a short timespan. Also, I have noticed consistently better http and ftp download speeds within the vm.