Google has made Adobe's Premiere Elements functionality available as a web-based service via it's YouTube site. This tool promises to make mashups a snap, while rewarding higher quality uploads.
At first blush, this tool has the potential to provide a free wide area workflow solution. Think about the steps to manage an "amateur broadcasting project":
- Create a YouTube account and have your group upload their materials to that account's "My Videos" area.
- Trim and create transitions between videos. Music will be available "soon", and I'm assuming you could do some simple voice-overs.
- Titles can be added, and you have a complete assembly.