Well, it's been around since mid 2009, two and a half years ago, and no sign they want to add FOL to it. My guess is they never will, same for HP FJ (but they have FOL for Despicable Me which opened this year - go figure).
^ Agreed. Plus, since on rockit you only sit 2 to a row, not 4 like the Mummy, Spiderman, etc, it doesn't really matter (to me anyways,lol) if the party gets split up.
DH and I rode using the single rider line and it was a ridiculously long wait. The standby line was much worse of course, but I was shocked at how long it took (Mid September). It seemed like they were rarely pulling single riders out to load.