website to help students with argumentative essays

I posted last week about the OVRC (Opposing Viewpoints Resource Center) - I still think it is an amazingly excellent source and gets an A for being user-friendly, but I've also been looking for sources that are similar but don't require you to log into the Virtual Library - since some students seem to resist VL use. I came across a website, ProCon.org, that looks promising. It is listed in the Virtual Library, but you don't need to go through the VL to access it. I know some students are working with argumentative essays right now, and I'm guessing a significant amount of those students claim that they have nothing to write about, so refer them to this site. The set-up is a little clunky, there's a lot going on on each page, but it seems to have some good info and it might help students to start thinking about topics.