I hope I don't come across as negative here, but I hate lists like this. Peopel are always raining on each others' ideas "Oh, what, you're going to make a myspace clone? Bahahahaha." (facebook) "Oh, what, you're going to make a facebook clone? Bahahahaha." (twitter) "Oh, what, you're going to make another dating website? Bahahahaha." (Okcupid, plentyoffish) "Oh, what, you're going to make another social bookmarking w…
However; when I inwardly cringe at these ideas being rehashed (possibly not the machine learning one), it's when someone non-technical is eagerly pitching me their Facebook for Dogs idea and trying to get me to code it up for free, it'll be the Next Big Thing, just you wait and see...