wetoku is still in beta, but I can tell you this: it's one to watch out for. The interview was a snap to set up - all I had to do was plug in my webcam (otherwise it sits in a box somewhere on my bookshelf) and click on a link sent to me via email. The web page consisted of the image of the interviewer (in my case, Eric Olsen of Blogcritics and Technorati) and the interviewee (me), and a simple chatbox where we can text each other. The interviewer presses the "record" button and we started talking. Simple!
It's easy to see how wetoku can be very useful (just view all of the interviews done by Technorati for their State of the Blogosphere report). I won't be surprised if we see many more wetoku interviews popping up in many blogs.