As a user I wouldn't mind having a desktop plugin showing n entries of 140 characters max from social media (Twitter, Jaiku, FB, etc), traditional rss/atom feeds and pod/videocasts. All mixed, whatever are the latest.

The info shown for each entry is Source - 140 chars - type of media - thumbnail if any.

Clicking the entry shows/plays the full content (offline if a wlan was available)

There is an OK button next to each entry. Clicking it makes the entry disappear and the next most recent pops up immediately.

There is a Reply button for those entries giving a chance to comment in the source.

something like that.