Does Twitter Have Legs?

Twitter was the "big thing" at the most recent SXSW conference in Austin, TX.  The question is how can marketers, salespeople or businesses benefit from this new Web 2.0 technology.  Is it a flash in the pan that will fizzle or does it have proverbial "legs."

At least one blogger has an application for salespeople:

"Travelling salesmen who want to communicate in a group whilst on the road - again, in a way that is recordable."

Please share your thoughts on how businesses can leverage this new technology.

Similar technologies are heading to the web like Jaiku so someone will win this battle but who?