Sorry for thread revival, but don't forget about the links that actually point to FB pages, with a few little nuggets added on.
Overview of structure of URL:
What protocol your browser should use
Code:
subdomain.domain.top-level-domain
In this case, usually
www.facebook.com
Code:
/path/to/files/to/serve.extension
The path to the file you want your browser to fetch. If it's extension is html, then you are asking for an html page, if it's php then you are asking for a php page (which would evaluate to an html page eventually).
Some GET variables to give a script specific values. Useful for passing along details of a page for pasting to others.
Why is this all relevant? Well it turns out that you can paste a link to someone that, if they are logged into facebook, will change their login details, send an invite to friends, etc.
Maybe you all know this is possible, but maybe this will help someone (I've just spent the last half hour explaining to someone who had their account "hacked").
