COmments Flying ! [HELP]

i have doing autoblogs mainly for learning and testing it myself on my subdomains of a hostgator account!! Its been since 4 months now since i started it! The Wp gets a traffic about 100 hits per day and some comments here and there!

But today when i logged in my wp account, i saw 150 odd comments posted with some damn URL with it... All were from US ip (different ones though)...

well, it didnt take a few secs to delete all those, but wat i wanted to know is, surely this cannot be done manuallly, should be a piece of tool... What tool is that?

Note: It posted about 150 comments in 5 mins all from different IP and for different posts!!

here is one good comment posting tool. Check buy and sell section of BHW