Yesterday evening there was a public debate about string theory held in Paris, between Lee Smolin and Thibault Damour. So far, accounts of the debate have appeared in Le Monde and at Fabien Besnard’s blog Mathephysique.
The Le Monde article is not very informative, but indicates that Damour defended string theory against charges that it was not testable by claiming that it predicted “possible classes of experimentally testable phenomena” at the LHC. Besnard gives a more detailed account, describing how Damour answered these charges of lack of testability with: “Lee, a subtle thinker, surely doesn’t believe himself the naive Popperian position he is defending”. He also evidently claimed that string theory was testable because it would be confirmed if a violation of the equivalence principle was found (he really should talk to Lubos, see here). Remarkably, he also claimed that observation of the kind of DSR dispersion relations that Smolin thinks LQG leads to would not be a problem for string theory, since one could also get them out of string theory (here I think he needs to talk to both Lubos and Jacques Distler).
Update: I hear that the event was recorded, and audio should be available by the end of the week at the web-site linked to above.