I released Wiinote 0.2.0 earlier this week. Wiinote lets you control Keynote (and now DVD Player and iTunes as well) with a Wii Remote; all you need is a Wii Remote and a Bluetooth-enabled Mac running Mac OS X 10.4 or later. Wiinote 0.2.0 adds support for controlling DVD Player and iTunes, as well as the ability to configure which Wii Remote button triggers which action.
Wiinote 0.2.0 is available as a free download and you can register Wiinote now for $7.95 (a special discounted pre-release price) and receive a free upgrade to all Wiinote 1.x releases.
Please let me know if you've got any bug reports or feature requests, either via email or in the Wiinote forums.