If any of you have the Sharp Zaurus SL-5500 (or the C700 -- hi Avi!), have you tried doing VOIP over Wi-Fi and the net using tkcPhone http://www.thekompany.com/embedded/tkcphone/ or any other VOIP software? What kind of quality do you get with this? If this type of PDA phone application really does work as well as Bill's comments would indicate, then I think it will drive a lot of voice traffic onto the Internet. We really need to play around with this stuff (voice) ourselves and understand it better because there are opportunities here with all the turmoil surrounding the so-called shift to 3G cellular. Here in England, BT recently ran some TV commercials to introduce free evening and weekend calling on the cell network by showing a couple using a cellphone upstairs in the baby's room to replace the broken baby monitor by dialling into the home phone in the livingroom. This is just one example of how changing the pricing structure could radically change people's behavior in using a service. -- Michael Dillon