Late Thursday, Apple released beta 8 (build 9m2199) of its iPhone/iPod touch software developer kit while beta certificates issued before June 9th also expired. The beta, a 1.25 gigabyte download, includes iPhone firmware version 5a345 and according to sources, improves stability as well as mentions a developer-only version of iTunes 7.7, which developers can use to "install iPhone OS Beta 8 on your Apple devices."