Jay7 - 2:50 pm on Nov 9, 2010 (gmt 0)
Some good advice here. I tried it as well, found 5 old sites with broken links, notified the owners and offered links to my site in exchange. One hasn't come back to me, the other 4 emails bounced back. I suppose the owners of those sites lost interest in them, don't keep them up-to-date and haven't updated their contact details either. Email addresses I got from whois records were incorrect as well. I'm out of ideas of how to reach the owners of those sites.