Web Worker Daily has written a post where they describe the Lifestreaming concept specifically for providing updates in regards to work for co-workers and such to track what you’ve been working on.
“Workstreaming is the next generation of the 11 pm email you send to your team to show them that you’ve been working all evening.”
Seems like a decent vertical approach to the concept if the tools you use for work could provide such information. I can see where MS Office Apps could provide an RSS feed for snapshots of the progress of documents you are working on.
Microsoft Outlook has had this for some time already. It’s called Journal. If you turn in on, you can see a timeline of email sent/rec’d, Office documents opened/modified/created, calendar appointments, tasks completed, etc. And you can point it at specific documents or applications. See: http://www.robertkbrown.com/2006/08/01/outlook_journal_the_best_quicklogger_you_never_knew_you_had.html