There are a couple features missing in the BlackBerry (et al?) version of the site which I think would be just peachy if we could find the time to add them:
1. Include the original post as quoted text with a reference when clicking "Reply to this message."
2. Provide the ability to assign rep on the BB version
3. Fix "User control panel" on the BB - it doesn't work. But you can go into your private messages, then click User Control Panel to get there. I would think this is a simple URL glitch or something.
I'm happy to volunteer some time to help fix these.
Food for thought.
I'm sure other folks have other ideas... feel free to add them to this short list.