I have several sites with lots of back links, but when I search Google for the backlinks, they are not showing up at all.

For example -
Your search - link:http://www.bettafish.info/ - did not match any documents.

Bettafish.info has links from many websites, including from PR5 and PR6 pages (which are supposed to get scanned by Google more often).

Also my newly acquired domain - http://www.ladcoappraisal.com - shows no backlinks. When I search Google for the name, I get many pages with links to this URL, including a Yahoo listing.

I think this happens with new domains that still don't have any PR in the toolbar. It has happened to me in the past with new websites and got fixed only with the toolbar update. Suddenly backlinks went from zero to over 500 or so...

Any other reliable way for me to measure backlinks?