I have a data transfer cable, a 2G cradle and the power adapter. All three of which are original that came with my 2G.
Do any of them (including the cradle) work with 3Gs, or will it fry it?
I just went from a 2g to a 3gs and only thing compatible has been my USB connector. Dock doesn't work, in car j-link cable for stereo, and car charger all didn't work for me.