Sega's released new levels for the Xbox 360 version Sonic Unleashed, via the "Chun-Nan" DLC pack.
The level pack (this is the good news) adds four new proper, daytime Sonic levels and (this is the bad bit) two new Werehog sections. We're going to go out on a limb on and guess that the latter bits are rubbish.
The pack comes in at 528MB and will cost you 250 of your finest Microsoft Points (£2.10).
As for PlayStation 3 owners, apparently the pack's already out on the Japanese PlayStation Store so all us Westerners can do for the moment is sit tight and wait for Sony to press the button.
Read the Sonic Unleashed review here.