THere's also the first p2p filesharing application for android on the planet FrostWire for Android http://frostwire.com/android it's free and has no ads or nags. If you don't have the time to install it, you can see pictures of it here http://www.flickr.com/photos/frostwire/sets/72157624632093759/ Built by the community of FrostWire developers over the world. It's still in beta but it's very functional, it allows for browsing, searching, sending, downloading and even chatting. You can basically share files over the internet, or on a local Wifi network. If you're say in school you could share files with other students, or if you're in a subway wagon and another android runs as an access point people on the subway car can share files during their commute. Excellent for conferences, gatherings, sharing files with family and friends in front of you or on the other side of the world.