I hope someone can help?  I want to experiment with some Bluetooth technology, but first need some advice in respect of kit to try/buy.

More importantly I need to know if what I want to achieve is possible.  

I want to use a Bluetooth to control several switches (max 8).  The switches will ideally have an on/off state but if possible a variable control.   The technology in the receiver should be very small and in the first instance I would like to control from a PC.

In the future I would be looking to deliver those BT commands via the internet, locally in the first place is fine.

Any help, assistance or advice is appreciated.