Of course there are apps out there which allow you to control your Apple computer with your iPhone, but that really isn't going to do you much good unless you have a Bluetooth equipped Mac in you home theater. If you are like most of us and just want to control your TV and peripherals with one device, then the new L5 Remote may be what you are looking for.
The L5 remote allows you to do a plethora of things that other remotes can't even dream of. As well as customizing your own interface and setting up the remote UI however you would like. there are a plethora of options available.
When it comes to remote controls, so far none of them really give us the level of customization we would all love so very much. So for me, spending 50 bucks on an IR dongle/app to use my iPhone as a remote control really seems like a small price to pay. The L5 will make its official debut at CES 2010 where we will find out if it can really live up to its rather lofty claims.