I have seen such a thing a while ago and decided i would love to give such a thing a try. Though i basically know what to do where and when i would love to know if someone here has some experience with these and wants to share some ideas?
Do you mean a hexapod with three servos each leg?
or just three servos total?
I have a octapod with three servos each leg = 24 total
here is mine 
here are some simple ones:
arduino:
http://letsmakerobots.com/node/22732
other:
http://letsmakerobots.com/node/15032
http://letsmakerobots.com/node/4947
I think he means "3 servos total" - for a recent one that was posted here on the forums (and very cute!):
http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1294651977/14