Mobile Air Mouse has been the app I’ve used most often since getting my iPhone 3G two years ago. The Mobile Air Mouse works by turning your touchscreen device (ipod touch, iphone, iPad) into a keyboard/mouse combo for your PC or Mac. A small server program running on your computers will allow your device to function both as a traditional mouse or as a gyroscopic mouse. The gyroscope version doesn’t work as well as the trackpad does but this app does an incredible job of replacing a standard keyboard and mouse for your computer connected to the television.
Here are the features

• Accelerometer based mouse
• Trackpad with vertical and horizontal orientation
• Media keys with volume and eject controls
• Web keys
• Application switcher/launcher
• Application notifications
• Unlimited custom media and web remotes with scripting capabilities
• Remote keyboard with modifier keys
• Function keyboard with arrow keys
• Oversized numeric keypad
• Programable hotkeys (can be set to run a program or keyboard combination)
• Scroll pad
• Multitouch gestures (supports scrolling & right click)
• Remotely wake up and put your computer to sleep
• Password protection
• Custom sensitivity settings
• Foreign language keyboards
• Supports Bonjour or static IP
• Works over Bluetooth PAN (requires carrier support, currently not available on AT&T)
• No screen size limitation. Works with multiple monitors
• Works over WIFI, no line of sight limitations
• Built from the ground up for Mac and Windows Visit http://www.mobilemouse.com