One of the things I've been watching lately is the growth of Podcasting. The idea is that various audio broadcasts online would be available for download, with RSS feeds being used to announce when new broadcasts are available. Adam Curry is the one who really gave this a kick-start with his Daily Source Code.
The other part of this is the iPod. There are a number of programs out there for watching the RSS feeds for these broadcasts. When a new show is posted, they automaticly download it and put it into a playlist in iTunes so that you can sync it to your iPod. It's all pretty slick.
My idea is kind of an expansion of an idea I've been playing with for a bit: Audiobooks. I could record an chapter at a time, and as I finish post it so that people can download. In the end I'd love to expand this to having a resource for various kinds of storytelling. Maybe do a book reading with a few people, each taking various parts. Or provide a directory for other people doing the same thing. As usual, the big issue is resources. I'll think about this a bit more after I get a bit more sleep.