I tried out this iDroid release on my iphone 3G 8 GB with iOS 4.0 and I have to say, it has purely no power management. It drains the battery even with being attached to the charger. iOS tells me, that the battery is fully charged, but if I boot into iDroid, then iDroid tells me, that my battery is at 39%. A few minutes later, even attached to the charger, it went down to 38%.
I'm not sure, what is causing this huge drainage, but I'm surely looking forward to an iDroid release with proper power management and phone support (to be able to properly call anyone, no matter if phone or mobile phone), because Android/iDroid beats iOS.