I want to monitor a website

Hi,

I'm looking for a script (why not in php) or something else which could make these things:

- the app must monitor a website (for ex punbb.org) and see when the page is updated.
- it can work with a cron job. Ex: every 10 minutes it monitors if the page has been updated.
- When the page is updated, it send an e-mail notification.

Have you ever seen something which coud do all that?

Ludo,