>Did somebody already used this SDK to port VFP applications to Tablet PC? If so, how did it went? Is it easy to use and learn?

You do not need to 'port' VFP applications to a Tablet PC. There are ActiveX controls and other components that allow you to take advantage of running on a Tablet PC if you want to, like an edit box allowing drawing, hand recognition, etc. VFP 8.0 was tested running on a Tablet PC and it works great as is, but it will be up to a developer to decide which Tablet PC SDK components to use in an application for running on a Tablet PC.