I haven't owned Lego since I was a kid but the fascination is still there whenever I see it. I got redirected to this via Wired at lunch today. Lego has a site where you can post new Lego concepts (you must build a demo to get it posted.) Users can then vote and if they hit a number (10,000 supporters maybe) Lego will build it as a production model.
I hit the link to get a look at this guys Firefly
creation. A great job. It already looks like a production set but would have obviously been made from random set pieces.