I've been busy with developing another theme for RoundCube. I've developped it for 0.2-beta release of RoundCube.
Some minor change to the configuration have to be done:
Config requirements in the main.inc.php:
$rcmail_config['list_cols'] = array('flag', 'size', 'from', 'subject', 'date');
Please let me know what you think of it, and what needs to be updated