Linking Forward From a Bibliography?

This post originally appeared on the Software Carpentry website.

This web site's bibliography lists 116 papers related in some way to the practice of scientific computing. I'd like to know:

1. what related papers I've missed, and
2. when a new related paper appears.

It seems to me that I ought to be able to upload the entire bibliography into some tool, then say, "Find everything that isn't in this list that cites things that are, minus everything in this other list over here that I've already looked at and decided aren't relevant." Going a step further, I ought to be able to prime some kind of robot to do this check automatically every week or so, and mail me when there's a hit so that I can either read it or add it to the exclusion list.

But "ought" doesn't put dinner on the table. I've had a superficial look at CiteSeer, Google Scholar, and Mendeley, but what I want hasn't jumped out at me. If anyone has a pointer to a one-step solution, please post a comment.