LifeStreams as an attention aggregator
Dandelife, the social biography network, posted a preview screencast of their forthcoming release of Lifestreams -- letting you incorporate your Twitter, Blogging, Flickr, Del.icio.us, Last.fm, YouTube and other feeds into your biography and timeline. Every attention breadcrumb can serve as something you tell a story about, or as a basis for conversations with your network.
This is similar to how I described an alternative web-only use of Jaiku yesterday, as an attention aggregator, but Dandelife excels at memory beyond the present. While I'm biased as an advisor to Dandelife, you can probably see how this will augment your Twitter use at the least and I'll be using both.