Bump! one of the most interesting apps I've come across in awhile. Basically it allows you to share contacts, photos, music, location, and even chat just by Bumping phones together. Once you Bump they are automatically saved in your contacts list and you can Bump with them anytime and anywhere. ie a virtual long distance Bump. It's pretty cool. Available for both android and iOS powered devices.

Direct link to their website : Bump!