I also ordered the Apple USB SuperDrive for S$98 together with the Thunderbolt to Gigabit Ethernet Adapter.
The only reason why I got it is because my brother and Li Xiang are getting their MacBook Air/MacBook Pro with Retina Display soon and I thought I might as well get the drive so that I can share it with them (and also blog about it). My brother would probably need it to install the Adobe Creative Suite 6 Design and Web Premium, and Li Xiang would probably need it to burn her artwork for printing shops or for her clients.