I'm such a post whore.
Anyway, I went around counting how much RAM all my processes take... and it takes 0.39005GB. This may not seem like much, but it's not very far from half a gig!
Well, the point is... Counterspy is the major reason for this. Totalling all its processes, it runs at around 150,000K. Is .4GB too much for just background processes (I've got a total of 2GB RAM)? If so, bye bye CounterSpy and welcome back SpySweeper.