The way it works is that companies who are interested in donation money to a charity and getting visibility on Twitter can chose to sponsor a charity. So then if for example a 1000 Twollars are donated, the company sponsoring the charity will donate a $1000 Dollars.
Yup, I had launched it from a netbook in a hotel lobby/restaurant in London since I was traveling at the time and we really wanted to get it out there (someone posted a Twitpic of that). It was a great experience and got to meet up with some great people via Twitter. One guy even found a problem in the code and averted disaster.
All the best,
Eiso