For everyone's interest re: JJ's value line, you can go to www.profootballweekly.com. It's discussed in one of this weeks articles and it is plotted for some wild trade scenarios.
It's interesting, but I don't think I'd use anything like that. Some drafts are deeper than others, making later picks even more valuable than normal. I would think the depth or lack of depth in a draft would throw off the point values. I guess it's popular though among the teams from the way the article reads.