Rishi Patel, a CIS major, along with two other USC students, Ian Castrovinci and Dennis Lopez, have just released CloudShouts. CloudShouts is an iphone, and soon to be Android, app that lets you post messages, photos, and have conversations with other people in the same geographic "cloud". Right now there is a USC cloud, along with 10 other University clouds along the Eastern seaboard. So, go download the free iphone app.
From their about page: "CloudShouts was founded by three University of South Carolina students that noticed inefficiencies within their college community. Inspired by foursquare and Localmind, the team strives to solve these inefficiencies by designing their own community-sharing platform. The future of communication is changing fast, and the CloudShouts team is building it."