Nice work Brent; I'm glad you guys are thinking about this. My personal preference is for intuitive over funky. The Steam interface looks good but breaks a few UI design rules. I would personally go for a menu system with the typical File|Edit|View style over a custom tab and button look. I'm not a huge fan of re-inventing the wheel; There are good reasons why high end commercial apps all stick to tried and tested simple layouts.
Just my 0.02! Ben
