More info from the Noise.IO forum, and thanks to Craig for pointing me in that direction.
It seems that the price for Noise is increasing from the original $6.99 (correct me if I’m wrong on that) to around £14.99. Now, from what I can make out from the screen shots and videos it seems worth it, so I’m not too bothered, but I do hope that they keep developing it.
Also, Noise have been talking to the people at BeatMaker about some form of integration. Now that would be interesting.