Is There A Device That Does What I Need It To?

Hi all,

Ive just moved house and like the idea of a managed audio experience throughout the house,

What I need to know is if there is a device that can stream music from my WHS to multiple rooms AT THE SAME TIME, creating an awesome audio experience!

They would need to be managed from a single device/app to start all at the same time FF, volume etc

I need it to be as cheap as poss really!

Is this something I can use AirPlay to do?

If I could make use of my current kit that would be great, My existing kit:

Full GB network
Dual Band N router
50Gb/s Virgin Media Fibre
HP Proliant ML110 G6 with WHSv2 (4GB ram. quad core xeon server)
PS3 Slim
Boxee Box
Dell Laptop
iPhone4
HTC Desire (mrs)
Xbox360 Slim

Any suggestions would be appreciated,

Thanks
Ash