Upload & Sell: Off
Looks like this feature is close to arrival: B&H has the cable listed for $298. For those who don't know, the cable is a Y-splitter, allowing the energy to be shared by two AcuteB heads. Pros: two light sources on location, less weight than two packs, lowest energy setting (per head) of 4½J. Cons: symmetric distribution only, total energy remains 600J and 85W total modelling, more temptation to give Profoto all your money.
Details at Profoto/B&H web sites.
P.S. Seems like more than one splitter could be used. The mind boggles.