I had a number of sites put up links to my site and all their link pages and home pages were at least PR4. The links were put up over 5 months ago. When I check Google using the link: command, none show up. Five months is enough time for Google to index them and there are at least 10 sites not showing so they all couldn't have been down when the Googlebot arrived. Today, I verified all the links still existed (they do) and the PR is still 4 or over (it is). What's wrong here? I'm sure my site would rank better if these links were "counted". Any help/insight would be appreciated.