Holler is a customisable contact form that uses AJAX to send messages without leaving the current page. It can be configured to send to a choice of a
Yes. Open up the plugins editor and customise the $holler_messages array. There are instructions inside.
As many as you like, just make sure that they all have a unique alias.
When the user submits, the message is processed in the background. It uses SACK, an AJAX Kit by Gregory Wild-Smith, that comes built in with WordPress 2.0
It should work with any installation that includes SACK. That means 2.0 for sure, and others if you <a href=http://twilightuniverse.com/resources/code/sack/">download SACK and put it in the wp-includes/js/ directory.
Nope. It should degrade nicely, and just leave an explanatory message.
Nope. It should degrade nicely, and say "Contact Form Disabled".
Nope. It'll only run on pages where you add the template tag, or posts and pages where you type in the content.