I already posted this in the Apps section of the forum, but I'm pretty sure there are people here who would love this app.
It's called SeePU - A realtime CPU & Memory monitor that runs in your notification bar. Especially for us overclockers, I think this thing is really useful!
Occasionally I have caught my CPU at 100% usage and opened up Process Explorer to find the Gallery app taking a ****ton of cpu for no apparent reason. A quick kill clears it right up.
It's also great to see how your memory usage fluctuates. Anyway, I just think this thing is really cool and nobody else seems to have it so I wanted to spread the word.