During a semester we are adding about 100 members a day, and outside of a semester it's about 50 members a day. As the site starts to get more recognition I expect those numbers to rise.
We still have a healthy to-do list, including real-time video, co-teaching and indexing more educational material, but the site already has so many features that we have the luxury of slowing down the rate of release of new stuff.
The next phase of edu2.0 is to focus on fundamentally improving the way that subjects like Math and taught and learned. This will be the topic of my next post.