Company Remotes:

Remote (Apple) 

This simple remote from Apple connects you Apple devices on your home network with your iPhone / iPod Touch.  It’s especially helpful when you throw a party as guests have the ability to request songs off your entire playlist and they get thrown into the queue.  For anyone with a mac computer, Airtunes speakers or an AppleTV, it’s definitely worth trying out.  Link (Free)

Boxee Remote

If you are familiar with the HTPC platform Boxee, you are aware that it’s designed to simplify your home theater pc.   Their iPhone application matches this concept and is designed to be a gesture control for the Boxee interface.  It also provides a handy keyboard for searching through your media.  Link (Free)

Sonos

If you purchased Sonos’s excellent multi-room music system, their official iPhone / iPod Touch application allows you to select zones of your house to play music in.  You can choose different music for different zones, stream music from the web, search for music on your home network and even set timers for music alarms.  Link (Free)

Sooloos

If you are using a Sooloos system from Meridian, then connecting this application to your system controls is vital.  You have the ability to browse your collection by artist, genre and even custom tags.  You can create playlists and control all of your music zones as well.  Link (Free)

Yamaha Network

Created for those with specific Yamaha A/V receivers (V2065, V3900, Z7), this application allows for multi-zone control of said receiver.  You have the ability to power it on and off, control volume and change inputs within zones.  The receiver does require a wired connection into your home network though.  Link (Free)

Crestron Mobile Pro

Ideal for installers, the official Crestron application offers control of your Crestron controlled devices.  For iPhone users, it also works with the 3G and Edge networks in case you forget to turn off anything in your house.   Assuming you have the proper Crestron hardware, you can control your home theater components, lighting and climate directly from your client’s iPhone.  The interface is simple and easy for the consumer to understand.  Link ($99.99)   Note: There’s also a free version to try as well.