As much as I want a second one, I can't justify it. I use my gopro a lot too - a lot of time lapse stuff. They are around $275 at the military exchange stores with no sales tax, so at least I can get a decent deal if I change my mind later.
I just bought a GoPro Hero 2 Motosports editions with a 32GB memory stick for approx $340 AUD... Kinda sucks that everything in Australia is more expensive