I am going to have some people write specific articles for me for my web site. To protect myself, I would like to send them some kind of "waiver" granting me exculsive copyright on the work they submit to me. Is there a standard templated agreement I can use for this? Would I need to send a waiver everytime they send an artcile to me becasue they could send in an article one day and then 6 months later say that it was not covered by the agreement. Anyone got any good ideas on how to go about this?