Today Only: Splashtop Inc. has Splashtop Remote Desktop (iTunes Link) in the iTunes App Store for FREE for a limited time. Deal expires May 8, 2011.

The highest performance remote access app bringing your entire computer to your iPhone or iPod touch, featuring full video and audio support! See your desktop, use your regular web browser with Flash and all of your bookmarks, watch movies, and access any application or file on your computer.
This version is optimized for iPhone and iPod touch. A dedicated iPad version is also available.