I'd suggest you add an author search as a feature request to bugzilla:
It could be useful for a lot of people.
It's cool that your university will take into account contributions to webwork for P&T. We've been thinking about setting up a sort of NPL "editorial board" - the idea being that this will not only help with quality control, but we also think it would help with P&T committees to show that the problems are peer-reviewed.
PS: One of the reasons we haven't done that yet is that we need people, ideally experienced authors, to be reviewers and also someone to lead that project. If anyone is interested in helping with this, email me and we'll see if we can get to critical mass.