While not set available for download, Keynetix's RockNscroll system for S60 has been demonstrated at CES, and will be on show at both 3GSM and CTIA Wireless. A software solution for the N95 to harness the accelerometers, their demo video of the software has raised many an eyebrow in the blogosphere. The software will be available from free on their website forum in the near future.

As you can see, this is a menu interface system, and very smooth it looks too - how it works in the real world, compared to the controlled testing on show here (or even on a conference floor) is going to be interesting.

More on their website.