It's been on here a couple of times Hazel, and there was a wee discussion over the compulsary DRM conditions in its ULA. I think you were on holiday at the time.
Then about 5 or 6 months later, a DRM guy came on the forum explaining that was now removed.
It is a good player, but it never did the gapless playback thing for me, although this version has had a very recent update, and apparently can play Avi files while they're being downloaded.
I've never tried that with MPlayer. I would find it really useful to be able to tell the framerate of an Avi file before downloading the whole thing.