This is my second taskbar config, it's been made a bit more subtle than the last one. It's all in gray, the clock hands have been shortened to fit inside the clock face. It tracks just the basic things I like to have at a glance -- date/time, CPU graph (with user & kernel time), memory, and network usage for the ethernet card and my work VPN.

The XP visual style applied is one of my own called Ion that's still very much in progress, but is aiming for a very clean, low-frills design.