http://www.informatik.uni-trier.de/~ley/db/indices/query.html
http://pubs.er.usgs.gov/usgspubs/index.jsp?view=adv
http://nrelpubs.nrel.gov/Webtop/ws/nich/www/public/SearchForm
http://eprints.ecs.soton.ac.uk/perl/search/advanced
http://liinwww.ira.uka.de/bibliography/#search
http://caltechlib.library.caltech.edu/perl/search/advanced
http://www.osti.gov/bridge/advancedsearch.jsp
http://dlist.sir.arizona.edu/perl/search/advanced
http://www.diva-portal.se/
http://highwire.stanford.edu/cgi/search
http://www.citebase.org/
http://www.ingentaconnect.com/search/advanced
http://scholar.google.com/advanced_scholar_search
http://archives.cs.iastate.edu/perl/advsearch
http://www.elsevier.com/wps/find/advproductsearch.cws_home?action=product_search&search=no

From the movie domain:
http://www.learnaboutmovieposters.com/posters/db/search/movie-search.asp
http://www.imdb.com/search