I recently noticed this
link on the DiscreetFX website.
I'd previously been, as I suspect many others are, under the impression that it hadn't been available for a number of years now.
I didn't know how long ago this link was from so I PM'd Bill Panagouleas last night and he confirmed that you can indeed still by it via the link.
I myself bought it in 2001 and have used it quite a lot over the years because of its many useful and fun features. Although there are a few bugs I can easily recommend it anyone who wants a good paint/image processing application.
I have run it on and A1200 060, Amithlon and OS4, it probably also works on MorphOS too.