I've tested Roundcube 0.2 on the Blackberry Curve.
1. The links are not clickable.
2. The content shows the first e-mail in the Inbox, but doesn't show what it says.
3. The Inbox does not show any e-mail list at all.
Sometimes the page forwards to a page saying the application is not build for BlackBerry browser.
It would be very nice to get a mobile version of RoundCube that works as a universal application on all mobile phones.