I’ve created a Google Co-op search for LIS Research, which is also linked at the LISauthor wiki. Try it out, let me know if you like it, and if you have other sites to suggest. It is currently set to search:

worldcat.org  
ibiblio.org  
llrx.com  
dlib.org  
ariadne.ac.uk  
firstmonday.org  
libraryjournal.com  
cla.ca  
cilip.org.uk  
alia.org.au  
ala.org  
ifla.org  
libraryresearch.com  
vtls.com/ndltd  
zippo.vtls.com/cgi-bin/ndltd/chameleon  
adt.caul.edu.au  
eprints.rclis.org  
e-prints.alia.org.au  
dlist.sir.arizona.edu  
scholar.google.com  

The aim is to capture popular online journals, eprints, articles, theses and presentations archived on association websites (especially IFLA’s conference papers which are all on their site).