Every time I buy new servers, I'm shocked as to how fast they are. At work we've just specced out a few 2x quad core Xeon servers. That's 8 cores per server all clocked at the same speed as the last set of dual-core servers - it is insane. I know that as a computer scientist I should be fully aware of Moore's law - as Wikipedia puts it:
Expressed on a shorter timescale, however, Moore's Law equates to an average performance improvement in the industry as a whole of close to 1% per week.
I urge you all to upgrade your hardware, you'll be impressed as to how fast it'll be. To be honest, we really need some sort of subscription service for servers: "I'll buy X times the same fixed price server every six months".