Stringy gravity, interacting tensionless strings and massless higher spins

Consequences of a strong version of the AdS/CFT correspondence for extremely stringy physics are examined. In particular, properties of N = 4 supersymmetric Yang-Mills theory are used to extract results about interacting tensionless strings and massless higher spin fields in an AdS(5) x S-5 background. Furthermore, the thermodynamics of this model signals the presence of a Hawking-Page phase transition between AdS(5) space and a "black hole"-like high temperature configuration even in the extreme string limit.