I bought it last week, a DC Portable HDD. Actually they are two staff.
A SAMSUNG 2.5” HDD (Spinpoint M40 Series, 40G, ￥675)
Plus A LOOK Portable HDD Box (LK-A3 ￥268). 
It is not a portable disk only, it can copy the photos from DC directly. So I do not need to buy expensive xD card for my Olympus C740 any more. All I need to do is carry this some portable disk.
And normal it can be used as a portable disk to exchange data between two computers – one in the office and another at home.
About the detail parameters of LOOK Portable HDD Box can be see at http://www.look.com.cn/prod_index.htm.
It looks good, isn’t it?