HarryM - 11:39 pm on Sep 27, 2005 (gmt 0)

John_1976,

I have two sites similar to yours that have almost disappeared from serps. However I know the reason, and almost expected it to happen. Basically I hadn't done anything to them for some time and they were just parked.

If you have a lowish PR (PR4 or below, say), Google is unlikely to go any deeper than the index page unless it sees something has changed. And if Google doesn't crawl your pages over time they will disapear from the index. The supplemental pages are probably those that are still indexed but the pages that link to them have gone.

Also there will always be some incoming links that disappear, so unless you also get new links Google sees your site as dying and therefore not worth indexing.

This may not be the problem that is affecting your site, but it may be worth considering. Try changing the index page, adding a couple of new pages, and linking to them from the index page. If you have a template system it's easy to change every page on the site.