This is an addon that someone asked me to write - so on the basis that if its useful for one person, its useful for more...
SynthesisSpy, as its name suggests, spies on Synthesis in your raid.
With all the tank swapping fights in SL, there is a need for chloro's to move their synthesis around during the fight.
SynthesisSpy shows a list of all current Synthesis' on you raid. It shows the caster + target.
If you are the caster or target, then the names are highlighted in green.