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simonuk - 4:28 pm on Sep 24, 2004 (gmt 0)
Google plays quite heavily on links to you so that is something worth looking into. Also make sure if you have a .htaccess or that kind of script that you haven't made a mistake which is preventing google from accessing your site properly. Another thing it might be is you've been penalised for something google didn't like. Could also be that you're using mysql or something and google doesn't like the way you've done it. That should get you started anyway.
All my sites that are at least 2 years old have ridden through every google update with flying colours. Sounds to me like something is missing from your site.