The title Less than Hero can be a reference to the 1987 movie Less than Zero.
After Leela gets of the video phone with her parent, Hermes ask if she can pick him up "a license to kill". License to Kill is the 16th James Bond movie, and the double zeroes in 007 stands for "Agent with a license to kill".
Bender says "You are going down. Or Down Under" to a kangeroo, because it comes from Australia or Down Under.
πKea (Pi-KEA) is a parody of the furniture store IKEA.
The prorfessor wants Fry, Leela and Bender to take his new item back and exchange it for a wobbly CD rack and some meatballs. IKEA is from Sweden, which is also known for the food Swedish meatballs.