I'm always on the lookout for easy-to-use contact forms. Lately, I've been using the two below as my starting point.
Dodo's Mail is an easy-to-implement and customize javascript contact form. You can add as many fields as you want and it will automatically insert them in an email. This makes it very quick to deploy.
Dustin Diaz has a more complex, Ajax-based contact form. We use a highly modified version of it on our homepage. This one requires some significant editing to adjust, so make sure you're comfortable editing the javascript before using it.
Neither of these is a the holy grail of contact forms. But they are good starting points if you want to implement your own.
