I’ve been after a simple 1 file contact form in PHP and jQuery for ages,

below is a dead simple cut&paste solution for a simple contact form 

refer: http://justin.kelly.org.au/contact.php for a live example
– also http://justin.kelly.org.au/#contact_form for example of it embedded in another page  

refer code inline below

note: updated 12 July 2010 with super simple spam detection based on http://devgrow.com/examples/honeypot/