After I solved a puzzle through InterviewStreet.com, a recruiter contacted me by e-mail and we set up an introductory phone call (15 min). She seemed really nice, she asked me to evaluate my knowledge on several technologies and sublects like C++, Perl, Algorithms/Data Structures, .NET Framework etc. She immediately told me that she was going to schedule a technical interview with an engineer.
The engineer called me several days later and asked me to solve together an algorithmic problem via a workspace sharing website. We could both write code simultaneously and see each other's work. The question wasn't hard and although I had a pretty good idea how to solve the task, I wasn't very smooth and made several mistakes. Maybe because it was my first technical interview ever.
Bottom line, I liked their attitude and they did a good job. It was my fault that I didn't go to a second interview and I've learnt my lessons. It was a very good experience.