Googling your name shows a lot of relevant online presence: do you look less professional?
brk: If your comments are generally "+1, Insightful" sort of stuff, then this would generally help you.Of course, this is based on the premise that you also have decent references and can speak to accomplishments in your prior job.  If all you have are online comments, then you don't have much going for you.  If you have a strong resume and experience plus quality posts in relevant forums, that should work in your favor.