Sean O'Steen, one of the hard-working audio editors on IT Conversations, had an article at Web Worker Daily on co-working in Berkeley. Sean's article discusses the concept of co-working in general and the Berkeley Coworking site in particular.
If you're not familiar with it, co-working is the trend for developers, writers, independents, and other professionals to spend at least part of their day in a shared, public space. Starbucks, Borders, libraries, and other places that have Wi-Fi have been popular hang outs for some time and now people have started to create specific co-working spaces like the Berkeley one.
Of course, this trend has been enabled though a number of technologies: laptops, wi-fi, email, IM, cell phones, VoIP, and even things like Twitter.
The draw to co-working is being able to work without the isolation that just working from home can bring or the structure that a standard office entails. I'm surprised at the number of people I know who spend at least a few hours a week working from a Starbucks or the library. Personally, I like to spend some time working at Borders when I can. I see the same group of people there all the time.