As Alex says, Social Software in a box, just add water

AlstraSoft E-Friends – Run your own online social networking community just like Friendster. Members create their own personal friends network, meet new friends, dating and join groups
From the site:
AlstraSoft E-Friends is an online social networking software that allows you to start your own site just like Friendster and Tribe.net. The E-Friends software allows members to connect to people in their personal networks and community, creating a new online interactive resource that is based on a trusted network of friends and associates on the internet

Musicans attempting to use P2P for distribution (with payment)..

About Weed File Sharing
From the site:
Weed is a service of Shared Media Licensing, Inc., a group of musicians and software developers from Seattle, Washington. They envisioned Weed as a better solution to the problems of Internet file-sharing. File-trading is here to stay, so finding a way to legalize it and supporting musicians at the same time is the most equitable solution for all parties concerned. Independent musicians and small labels have a hard enough time making a living these days, so something revolutionary is needed to give them some leverage.
Weed encourages file-sharing while making payments to musicians at the same time. File-traders who respect artists’ rights are rewarded and a new community of file sharing is born! Anyone who buys a few songs can become a distributor and put up a page with their songs or put these songs on a P2P network.

Linux distro for routers and more

NYCwireless
From the description:
Pebble Linux is a smallish (smaller than 64megs, larger than 8 megs) distro image designed for embedded style devices such as the Soekris boards, or a Stylstic 1000. It is based off of Debian GNU/Linux. It runs on many different types of systems, such as old 486 machines, mini-itx boards, or the $199 machine down at Frys.

TiVo to your friends favs

RSSTV: Syndication for your PVR
From the site:
We propose to share program information by building on existing syndication infrastructure. Specifically, we’ll add a number of namespaced elements as an extension to RSS. The value formats for these elements will be taken directly from XMLTV, a source of publically available program information.