Ok! Thanks for the advice!

But the princess is in another castle. I wouldn't necessarily go that far, that I would call those tools...at least not the system selling kind.

I would totally buy a Theremin(aka aetherphone if it sounded good though. Theremin could also use that proximity sensor btw! Like controlling the picth on the touch screen and amplitude with proximitysensor!

But still a sequencer and synthesis engine would force me to buy this phone, and another for my wife, if it was good. And couple more for my brothers for synth jamming.

Perhaps n900 could even offer shelter for a whole synth family, that shares the same sequencer but has different synthengines, like a virtual analog or two, fm and samplebased...and Theremin....and Mellotron! I would buy them all! With money!!! If n900 doesn't have enough strength(who does) to carry different modules simultaneusly, perhaps the sequencer could have audio tracks! You could for example make a sequence on a rompler that consist of drums, bass and organ, put effects on them and turn it into an audio track, thus releasing some of the processing power and effects back into use and change into virtual analog synth and play some pads and leads on top of the cake and so on and so on and then mix the different tracks into radio hit and buy a limousine!

What about wireless syncing with other n900's for jamming. What about using the synth for a sound module with some midicontroller?

I'm getting pretty excited here! Some one tell me that its impossible!