MeDevil post a new article about the new version of iBluetooth, as they said this version only works with iPhone OS 3.1, So if you want to update bluetooth experience go and update your iPhone (or iPod Touch) to OS 3.1 -How To?-

Here is the main article in MeDevil blog:

I’ve just finished most of the User Interface and I’m now working on the daemon part. Splitting the UI from the stack is required for better perfomance and less bugs.
The new release will be ONLY compatible with 3.1 (and later) firmware and with the following devices: iPod Touch 2G (1G doesn’t have bluetooth), iPhone 2G, iPhone 3G and iPhone 3GS.
Dropping the 2.x compatibility will allow me to better support 3.x devices.
As said before, the old license purchased for iBluetooth WILL STILL BE VALID for the newer 2.x version.