Look for personal blogs. Doesn't really matter if thy post once a month or once a day, as long as the quality of what they post is good and they seem knowledgea

Look for personal blogs. Doesn't really matter if thy post once a month or once a day, as long as the quality of what they post is good and they seem knowledgeable. Take a look in their Twitter stream, it can speak for a developer lots of times (though don't use it as your only metric!).