Overheard in New York is, bar none, the most entertaining site i've come across in months.  The simplest ideas are always the best;  people overhear conversations in new york, and send them in for the world's amusement. For example, here's a conversation that took place between 2 kids on the 6 train:

 

Kid #1: Paper beats rock. BAM! Your rock is blowed up!
Kid #2: "Bam" doesn't blow up, "bam" makes it spicy. Now I got a SPICY ROCK! You can't defeat that!
--6 Train

yes, young man, you are correct... you just can't beat spicy rock!!

 

a few more first prize winners: