A little off-topic here, but it kind of puzzles me why MongoDB gets so much attention and the other half of FourSquare's stack: Scala/Lift, that scales just fin

A little off-topic here, but it kind of puzzles me why MongoDB gets so much attention and the other half of FourSquare's stack: Scala/Lift, that scales just fine, and has not given them problems at all gets hardly any attention.