CUUSOO Has worked as shown by the kits it has produced, however TLG isn't using retail stores for distribution, probably because most of the sets wouldn't sell in huge numbers. As for the ideas that haven't got through, well most of them were either unsuitable completely, or had themes against what Lego want to 'endorse'.
Does anyone else have high hopes for the EVE Rifter ship? The model looks good, the developer of EVE, CCP has been 100% supportive of the idea, with Lego kits showing up in some of there development videos, and they advertised the CUUSOO page at the game log-in screen, plus the game doesn't go much further than SW in terms of content, only nothing bad ever happens on screen.