I had another thread some time back about selling tunes to mobilphones (downloads)
I do not think I was presise enough in my questions for help (in this forum)
I do not know if I need a "full" web shop?

The idea is this.(As an example)

(Example senario)
I have a gig someplace.
In front of me (or some place else in the room) is a poster that says that the tune "my song" can be loaded down from "my SMS adress"
to a price og 1$.

The customer send an SMS to my SMS adress. Load down the music file, and 1$ is taken from hes mobile acount in the same moment.
(I want the prize to be set to one or two dolar)

What do I need to have an arrangement like this up and working?

I would be grateful for any thoughts, coments sugestions and of course how to make this work.

Best regards
Tono