I think it makes sense to port Hamachi to Ipod/Iphone because:
Ipod/Iphone are becoming a vital application platform. The number of apps running on Ipod/Iphone (now it's getting close to 10,000) is growing faster than that of any other platforms.
Given hamachi already runs on Linux, and Ipod/Iphone's OS is a Linux variant, expanding Hamachi's territory to Ipod/Iphone makes great sense.