There does seem to be a lot of niche interest in bluetooth, but MicroSoft are letting developers down by not providing a bluetooth API for Windows and Windows Mobile. How beautiful it would be to create a solution with a couple of Win Forms and Mobile Forms app projects and use the same API in both to communicate over bluetooth, serial even IR. But no. There are even videos available on Channel9 where MS devs talk about the amazing work they've done using the MicroSoft C# bluetooth API but simply don't make any of the useful information available. What's going on MS? Is it because you know BT is destined for the bin? And no, I don't consider the above link to Channel9 a productive one. Is that really the best MS can for us? Anil Dhawan's link is broken!