Business guide to Twitter

I wrote about Twitter when I was contemplating its uses and actually found some really interesting side cases – not all business cases, but interesting nonetheless. Did you catch ones like these?
– very small surveys
– status updates for you coworkers who might be looking for you in your office or trying to decide whether to call your cell or work phone
– invites to events
– friendsourcing (something that your video touches on but in the reverse, looking for work), asking for help or references on a particular topic
-conference coverage using Twemes (Twitter themes, like http://twemes.com/doctrainwest)
my favorite techy one is
– integrate Twitter as a cost-free SMS gateway into your own applications (Monitwitter, sadly, has stopped active development)

And Twitter is just plain fun sometimes, too.