WordPress.org

Can you alter the format of the messages?

Yes. Open up the plugins editor and customise the $holler_messages array. There are instructions inside.

How many email choices can I have?

As many as you like, just make sure that they all have a unique alias.

How does it work?

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

Will it work with WordPress 1.x?

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.

Will it break if the user doesn't have Javascript?

Nope. It should degrade nicely, and just leave an explanatory message.

Will it break if the XML call fails?

Nope. It should degrade nicely, and say "Contact Form Disabled".

Will this run on every WordPress page and post?

Nope. It'll only run on pages where you add the template tag, or posts and pages where you type in the content.