More information from Matt Cutts on websites losing pages: We're going to keep digging in, but people need to bear in mind that Bigdaddy does have different crawl priorities, so a site that had more pages indexed by the earlier Googlebot won't necessarily have as many pages indexed in the future.

Matt Cutts just said "I believe the crawl/index team certainly has enough machines to do its job, and we definitely aren't dropping documents because we’re "out of space."

Please do let me know about this "TrustRank" System.

More on TrustRank at http://www.webuildpages.com/blog/link-building/pagerank-sculpting/ and at http://www.seomoz.org/blog/whiteboard-friday-using-trust-rank-to-guide-your-link-building