Benny Goodman at Carnegie Hall 1938 is an iconic record. It has been in print since 1950, and it offers a great snapshot of Swing at his height, not only musically but socially. However, to this day we don't have a complete issue of the music, as I explained in this previous post.
There's a new reissue just out—Benny Goodman at Carnegie Hall 1938, Sony Music Entertainment (Japan) Inc., Blu-spec CD2 SICP 30223-4. This has been released in the new Blu-spec CD2 format, but it's based on the previous official CD master (C2K 65143, from 1999), and therefore it's still missing half a minute of music, although the sound seems to have gained definition.