Which Canon

I'm looking to buy a camera to use in "tethered" mode. I'm pretty much decided that it needs to be a Canon as they (Apparently) come with the software required to do tethering, for free.

However, the camera really needs to have a "power in" jack to save having to change batteries and I can't really see from the various website wheich models have this feature.

Budget is an issue..

So..can anyone reciommend a cheap Canon bridge camera, with power in jack?

Thanks all!