Hey I'm going to Europe in a couple of days and I'm wondering if there's any way to get free calls while there (at least to the states). To clarify, I'll have my Droid with me, and I'm wondering if there's a way to call people when I have Wifi. I know the official Skype app doesn't work on Wifi. Unless there's a hacked version? Also, I use Google Voice, and I'm pretty sure there's a way to do this with sipdroid or something of the sort. Is that my only option?