VPN-for-rent services are multiplying: HotSpotVPN.com is the grandpa in the field, but WiTopia.net's new personalVPN offering challenges their price and technology. In this article at Mobile Pipeline, I talk about both companies services. HotSpotVPN's recently introduced SSL VPN service competes head-to-head with personalVPN but has higher grades of encryption available at higher costs. Read the whole article for the run-down.