jake [1] is now much faster, includes many more databases, and also enables article searching. if you add volume/issue/page/date information when looking for an article, jake will create urls to that article within various databases which enable such url linking. jake is also now under cvs control [2].
Links:
[1] http://jake.med.yale.edu/
[2] http://oldap.med.yale.edu/cgi-bin/cvsweb.cgi/jake/