I know it's a Dev Preview, but we should fix this as we go along the beta so we are not totally surprised when final goes out.
More details here: https://github.com/shazron/phonegap-questions/issues/16
Been happily building to my phone with Xcode 4.6 (phonegap/cordova 2.5.0)
installed ios7 developer preview and Xcode 5 DP and now building to the phone fails.
(error screenshot here: http://d.pr/i/akfq, let me know if I can get specifics for you)
Build succeeds and runs fine in iOS simulator.