The pgstatpage functions allow you to see the information about the heap page or btree index page. (inspired by pgstattuple)
The pgstatpageproject is a PostgreSQL Community project that is a part of the pgFoundry.
The pgFoundry page for the project is at http://pgfoundry.org/projects/pgstatpage, where you can find downloads, documentation, bug reports, mailing lists, and a whole lot more.
