Google has posted some new content to their “Google Information for Webmasters” FAQ.
A section titled, “Advanced Questions” includes answers to the following questions:
- How often will Google crawl my site?
- How can I migrate my site to a new IP address?
- I’d like my site to return for pages from a specific country.
Also included is the official Google line about results labeled “supplemental.”
From the FAQ
Supplemental sites are part of Google’s auxiliary index. We’re able to place fewer restraints on sites that we crawl for this supplemental index than we do on sites that are crawled for our main index. For example, the number of parameters in a URL might exclude a site from being crawled for inclusion in our main index; however, it could still be crawled and added to our supplemental index.
The index in which a site is included is completely automated; there’s no way for you to select or change the index in which your site appears. Please be assured that the index in which a site is included does not affect its PageRank.