There is a rumor that Heat management is looking to bring Keeyon Dooling back. Orlando management was quick to squash the rumor, but I have a feeling because Orlando has too much talent at PG that they might deal after all. I personally would love to get Keeyon back in Miami. I always liked him and he is a really talented player with the right team.
The other possibility is Eddie House. The journeyman (well became a journeyman after the Heat let him go), has become a really solid player with other teams specifically the Suns. I would like to see Eddie House back as well, but would prefer KD.