I get web on the Sprint 700WX all the time. You can use the Verizon Treo Update on the Sprint Treo. It changes all the Data Provisioning, after that its just like setting up any other phone.
There is a guy selling Premade cables on E-Bay for $75. Plus the LG cable you need to buy is everywhere on the web. Its in mobile office kits, futuredial still makes it contrarty to popular belief.
Maybe I need to do a write up for you guys, because it definitly works very well.