[bergman]

This post could fit under "apps" and "accessories". I'd like to control my sound system from my iPad, but I don't want a plug-in IR emitter. My concept would use either WiFi or BlueTooth to communicate with a receiver that emits the appropriate IR signal to control the sound system, tv, etc.. )I'm aware there are a couple of systems that include plug-in IR emitters for the iDevice. I'm not interested in those.)
Does such a system exist?

[Pocobear]

Check out the Griffin Beacon on Amazon, it's blue tooth, and requires no plugin devices for the iDevice, just software.
Amazon.com: Griffin Beacon Universal Remote Control for iPod touch, iPhone and iPad: Cell Phones & Accessories

[bergman]

The Griffin device looks good and very inexpensive. Does anyone have any first hand experience with it?

[Karenkcoulter]

Logitech makes one as well.

[justinbob]

You can search online for Remote Controlling Mac OS X Audio Sources

[mobileapp]

Yup dear, I also recommended online for Remote Controlling Mac OS X Audio Sources, by the way thanks info for share to us.