'09 'bu ordering guide
The 6sp. will be standard on 2LT and LTZ in '09 according to this, optional on 1LT.
Also the Aura gets 6sp. across the board for '09 and loses the 3.5L, but gains an XR 2.4L allowing a loaded out 4cyl. much like the LT2/LTZ Malibu.
Also I believe I saw a 2.4 LTZ at the local Chevy dealer the other day. It was fitted with the 5 spoke rims like the HHR LT has come with.