I have mentioned COinS a couple of times. Dan Chudnov has a nice site which provides bookmarklets and Greasemonkey scripts which support linking to institutional resources by acting on COinS embedded in web pages. It leverages the data in OCLC's Resolver Registry:

Below is a form for finding bookmarklets and greasemonkey scripts to support COinS links at a number of institutions. All of the data you can search for comes from the OCLC OpenURL Resolver Registry, from which OCLC has kindly provided a subset for this page as an experiment. [COinS Browser Extensions for Your Library.]