Community Help: Legal Question

Sorry if thas has already been posted, but I couldn't find it and the Term s of Use didn't quite clarify it for me:

By submitting our work here, does that mean we cannot publish it in print and sell it? (i.e. does it become copyrighted by bloggingnetwork.com so that we may not use material from our blogs for articles or books we intend to have published by a magazine or publishing house?)