Thanks for the reply Ted.
I am very impressed with DS2, its a very complete program, the integration of the piano roll and the tracker interface is a revelation. I do have Renoise but DS2 is much more approachable, better sounding and the interface is great.
I don't understand why its not more popular, it is VERY hard to find, I did not find it under Google at all (Search for tracker/sequencer etc...), only through a direct link on another forum. In the way of a suggestion... maybe a marketing rethink would help?
But all this is immaterial, no matter how good the product is, it needs some sort of official support. So unless the author at least replies here, I can't, in all good concious, even think of buying.

Ian