Yeah, I have the blue too. The orange will match the AC adaptor light, though, if the Powerbook's battery is charging. 🙂
I'm not normally a fan of lit-up mice, but the light thing is pretty nice. It turns off when your computer is asleep, and turns on as soon as your Powerbook turns on. This is obvious functionality, of course, but I'm pointing it out anyway. 🙂 It's a nice feature to have.