I have written before about security issues when using wireless wi-fi networks in public places. Most public access wi-fi networks are not encrypted, meaning that anyone with the proper software can intercept and read whatever you are sending and receiving. I wrote about this recently in an article entitled Turn Off File Sharing in Your Laptop! that is still available at http://goo.gl/jqGgh. When traveling with a laptop and connecting from hotel rooms, coffee shops, airport terminals, and elsewhere, I always use a VPN (virtual private network) to encrypt my communications and to keep everything private. However, until today, I didn't have a good VPN product for the iPhone.