I've only formally been on the project for a couple months but I'd love to spend more time on it too. One of the things slowing me down is finding out exactly what the community uses, needs, etc and then working to make that happen.
A few things high on my (personal) agenda are: formal support for <SIP> (launched yesterday), better support for Queue, internationalization, and some infrastructure improvements around upgrades, plugins, etc.
Feel free to drop me an email (check my profile) and we can chat. :)