We use Google Analytics quite a bit here at Fuzzy Math, and most of our clients do, too. It’s always a question we ask on every introduction to a new project, whether it’s for the company’s website, intranet, or admin tool. Properly configured, Google Analytics can provide a rich quantitative portrait of your users, like a paint by number picture when you first take it out of the package. Qualitative data from participatory design wokshops or direct observation in their environment colors your picture with a richer perspective, but that’s a topic for another time.
Heck, I think they just sped up the whole darned Internet!