The LimeWire team set it to 3 as a default. The whole purpose of ultrapeers was to decrease network traffic among low-bandwidth host. The reason they have implemented the "multiple ultrapeer" connection feature is to make assurance you are pretty well connected to a large group of hosts. Before Ultrapeers were not well connected b/c LimeWire was the only client with this techonolgy. This is helping ultrapeers grow among the network. So hopefully other clients such as BearShare, Gnuleus and etc will join in on the ultrapeer connectivity. Then you'll only to have one Ultrapeer connection to be connected to the same amount of hosts as you were with the group when connected to multiple ultrapeers. I come this clears things up.