I had the same feeling, the website doesn't look ... done. However, I think it is nice to see that MS is launching its own initiative. The more, the marrier. I'm especially interested to see how their LDA variant performs.

Still, I hope they continue to make the documentation a bit more accessible. In example, the LightLDA documentation (http://www.dmtk.io/lightlda.html) gives no indication of the output I would get from this. Do I get all the matrices (word to topic, topic to doc) or just a list of top topics, or...?

Perhaps they planned to do it already, but they had to move their timetable up in reaction to Google's own efforts. If they felt giving google too much time might create a significant first mover advantage it could certainly make sense.