Corporate P2P is the next big application according to Forbes:

file sharing is a powerful technology, and its legitimate uses cannot be denied. The beauty of it is that it doesn't require a central server. Users who want a file search among other "peers," scanning all the computers on a network and then swapping bits. The bottleneck at the file server is bypassed.

....Last October, in its ongoing effort to insinuate itself into Hollywood, Microsoft paid $18,000 to promote Lions Gate Films' coming-of-age movie Rules of Attraction, using the Altnet peer-to-peer service. Altnet happens to be bundled with Kazaa. For a fee, its search technology will push legitimate music files and videogames to the top of Kazaa search queries. Hundreds of games are downloaded on Altnet daily, for $10 to $25. Music files cost users between a dime and a dollar; a 30-day movie license runs up to $4.

Even Napster cofounder John Fanning is making a comeback. Fanning, uncle of Shawn Fanning, is chief technology officer and founder of NetMovies, a movie subscription service. The Hull, Mass. company, similar to studio-backed Movielink, is testing its publishing system, which, for $5 a month, will allow viewers to download old classics and purchase new releases, like Bruce Willis' Hart's War. Blockbuster (nyse: BBI - news - people ) is an investor.

....Ian Clarke, the 26-year-old behind file-swapping service Freenet, is about to enter the corporate world. In March he will launch Locutus Enterprise, an application that wraps a three-piece suit around Freenet's technology. Companies that buy Locutus will enable employees to search for and share work documents by placing them into one of, for example, three folders: one for a work group, one for a department and one for the company. Locutus will transport encrypted PowerPoint presentations, e-mails and Word documents on a system built on Microsoft's .NET.

The corporate market is getting other file-swapping schemes. Groove Networks, started by Lotus Notes creator Ray Ozzie, has won a $50 million investment from Microsoft to promote its document-sharing platform beyond customers such as Bertelsmann AG, Neutrogena and Pfizer. Blue Falcon Networks has legally dealt downloads for years for companies such as Virgin.