Started in 2009 and people are still replying as of recently:
http://dangerousprototypes.com/2009/08/27/why-do-you-hate-the-arduino/
Not a lot of replies though but seems like anyone is willing to rant for a bus pirate 
I thought I'd help keep it going with my 2c worth :), I wonder if the bus pirate offer is still on?
Rob