Windows 7 does not have any support for Bluetooth Low Energy stack. There are 3rd party commercial products, but who would want to install additional costly software just to use a keyboard/mouse combo. I do not have a Windows 8 machine and because of this particular reason, a few features of the HID stack cannot be developed and tested, such as LED reports, remote wake-up, etc. Although I have a touch-only tablet that supports BLE, using it for testing is not enjoyable and it cannot be tested for mouse feature.
The only do-able feature left to be implemented is the name change via serial. After this feature is implemented, the development of the project will be ceased.