1. What's the fastest compression program? I'm willing to bet that gzip isn't it. [link|http://www.oberhumer.com/opensource/lzo/|this] may warrant investigation - I'm going to have a play!
2. Is your gzip appropriately compiled for AMD64, or is it a generic i386 binary?
3. Your Quad Opteron would be much happier in my house. Ship it to me right away!