X10 Home Automation fun without a computer?

So, having enjoyed a setup using Airport Express around the home with Apple’s remote app for the iPhone, I started wishing there was a way to switch on the 2.1 speaker systems connected to each Airport terminal in the same way I could fire up Remote and start playing my tunes from any room. No fun doing this and then realising I have to go and switch on speakers and in some case Airport express devices (I don’t like leaving these plugged in as it feels like a waste of power when not using them).

This sparked some hunting around for an X10 solution, but it seems like most of them use a PC as the server? Also, the X10 network seems to use the mains electrics rather than using our existing network which my iPhone would be comminicating with.

There’s an app for the iPhone called X10 Commander or something similar, but I’m not happy with thinking I need a computer running all the time just to indulge my nerdy lethargy. My ideal X10 setup looks like this:

1. Local web interface or iPhone App
2. iPhone connected by Wifi
3. Router to mains network adapter (or straight to X10 convertor?)
4. Device to be turned on + off.

Insteon make a device called a Powerlinc that touts an iPhone interface, but that has recently removed the ability to control X10 hardware (opting instead for controlling Insteon devices only to force you to upgrade).

Might be a long shot, but does anyone on fluther have any ideas?

Thanks in advance!