Agreed. I just bought my MBP last month. It came with SL and FaceTime was not included. Based upon that I answered what I did.
Version .9 was free download. Version 1.0.2 is $.99. Version 1.1.1 is free with Lion.
FaceTime is included on any Mac that has a built in FaceTIme HD camera, regardless of what version of OS X it was shipped with. You can check if you have a FaceTIme HD camera built in by using System Profiler and looking in the USB section. One of the listed devices will either be a built in FaceTime camera or a built in iSight camera.