In my estimation the clearest path to entropic gravity has been shown by Jerzy Kowalski-Glikman. His 4 February paper has some definite advantages over anything that came out since. http://arxiv.org/abs/1002.1035 Kowalski-Glikman, you remember, was the organizer at Wroclaw of the July 2009 Planck Scale conference--probably that year's most successful QG/unification conference. I've been following his research beginning in 2004 and my impression is he rarely makes unnecessary moves---his output is consistently to the purpose. Credibility and track record are a plus. Another advantage is that he points to where the underlying degrees of freedom should appear. Topological defects in the domain of a constrained topological field theory (BF). So it's not some nebulous abstract entropy he's talking about. There are equations. There are arguments to support what in other papers may simply be assumed. Another advantage is he gives a clear brief summary of the history---from its pre-1995 sources through Jacobson, Padmanabhan, Verlinde and Smolin to the present. Another is that K-G was directly involved (with Laurent Freidel and Artem Starodubtsev) in developing a BF formulation of quantum gravity+matter---he knows the constrained topological field theory approach first hand. See Freidel, K-G, Starodubtsev "Particles as Wilson lines of gravitational field" Physical Review D 2006; gr-qc/0607014 I expect we will see some further papers following this short note. So I want to start this thread to discuss K-G's 5 page note and whatever follows along the indicated path. Again the link: http://arxiv.org/abs/1002.1035 A note on gravity, entropy, and BF topological field theory Jerzy Kowalski-Glikman 5 pages (Submitted on 4 Feb 2010) "In this note I argue that the expression for entropic force, used as a starting point in Verlinde's derivation of Newton's law, can be deduced from first principles if one assumes that that the microscopic theory behind his construction is the topological SO(4,1) BF theory coupled to particles."