The ML blogs I follow are all atwitter about MetaOptimize (optimizing the process of optimizing the process of...).
Joseph Turian has a nice blog about all sorts of issues -- jobs, programming, open source community -- but certainly the most exciting part of the site is the QA section.
There's already an active community up and running over there, and the publicity its getting today will only help that. So check it out, ask a question, answer a question even. It's got the potential to be a very valuable forum for machine learning, and nlp questions. Only time will tell.