App Name: Dropbox
Description: Dropbox is a free service that allows you to share your photos, documents, and videos between your computers, Android smartphone, and with friends and coworkers. Dropbox is available for multiple platforms and is very easy to learn and implement. You start out with a free account of 2GB but can earn more free space by getting others to sign up.
Cost: Free / Paid Options
Detailed Preview/Review Of The Official Android Dropbox Client Beta – Android Police (updated July 2011)
Dropbox – AndroidTapp
Dropbox Android App Review – MakeTechEasier
Dropbox Review – PCWorld
Dropbox for Android Review (video) – Top 10 Android Apps