backup/maintenance scripts?

I asked a similar question yesterday about scheduling backups and vacuum,
but I thought I would make a more direct request:

Does anyone have an example of a postgreSQL scheduled maintenance script
(cron job, other) that they would care to share with the list? An example of
a script that performs vacuums, creates backups, etc would be great. Perhaps
we could add a section on routine maintenance in the docs and include a good
script example.

Thanks,

Bruce