Why? what is the point anymore. A single processor Tezro starts at 20k. If the processors are anything close to what they were a few years ago that would mean the 4 processor version is closer to 35-40k. You can get a really nice Linux or G5 box with HD capture/output for under 10k and the bus speed/size these days is the same as SGI.
Unless your app only runs on SGI like Discreets turnkey system, then I wouldn't bother with an SGI anymore. Also Apple said they would guarantee that they would continue to develop on SGI/linux till the end of 2003 and then reevaluate whether or not to continue to support them. I could definatly see SGI support dissapearing but linux staying.