Allow avatars to become sit targets via a script. This would allow for incredibly interesting content such as dancers, couples walkers (Piggy back rides, hugs, holding hands), etc. that would not require a rezzed object. Avatars seated on another avatar could be animated, and control the target avatar, or vice versa.

This would need to be controlled by the target via script to prevent people from just sitting on others. Allowing this would simplify the creation process for creators making these types of systems. It would also allow users to explore second life even in no rez areas such as stores, public land, etc. while still having the ability to interact with others without needing to rez an object.

An example of this could be an avatar attached car, golf cart, sleds, planes, etc. Having the ability to explore second life without worrying about a rezzed object getting stuck on access walls, their object being returned, region crossings, etc.

A stretch ask would be to enable synced teleporting between seated avatars.