According to their web site, the 755P is supported. Exactly what you described is how I use PdaNet on my 680. I don't use it often, but on those times when I need access from my laptop and WiFi is no where to be found, this is an awesome application! I think most carriers look down upon the use of this, as they certainly want to sell you a plan for just for your laptop access, but Cingular has never questioned me about my data use in 4 years of having a data plan and 3 of those occasionally using PdaNet.