I love this concept and the research that's been done, but I find the interface frustrating and the game aspects of SB to be somewhat lacking. I went to Mindbloom http://www.mindbloom.com and Daily Challenge http://www.dailychallenge and I really like aspects of both sites, especially as it pertains to interface and game play. I would like to see more of that incorporated into SB. I find myself going to SB less and the others more, but there are things specific to SB that I really like and I don't want to abandon the site.