That is a nice idea... I'll check it out (gotta edit this post as soon as I have the answer)
*edit*
hmmm, visibly not... no pointers, no address referencing in UnrealScript.
UnrealScript overview (official doc):
http://unreal.epicgames.com/UnrealScript.htm
*edit 2*
Crazy idea then...
tag this structure with an unique magic number (long enough to be REALLY unique), and have the bot core scan the OS memory for that fingerprint. Once it finds it, it knows the address of the struct.
Feasible ?
Anyway, the problem is still half-solved, because it'll only be a one-way communication.