It is an interesting application, however it is important to remark that some previous works were based on anisotropic media...and others were not perfect due to phase delays as well as reflections...

Recent results April 2008 show that perfect invisibility using isotropic media i.e, simpler materials...and without time delay and reflection...are possible.

http://techon.nikkeibp.co.jp/english/NEWS_EN/20080418/150685/

http://invisibility.research.googlepages.com/

very nice bit about the scrapping :-)

By the way, the solution to most of the well, let's call them "visibility challenges" mentioned in the article has been known for decades. It is called a submarine.
Under water, you reduce the number of problems to one: your sound signature. And relatively reliable solutions to that problem have been explored for a long time. By now, they are relatively good at hiding a sub.
In contrast to that, it will take incredible lots of money to get those metamaterials-based ideas anywhere for surface ships. 
But anyway, great if it brings about interesting jobs for physicists and engineers.

I've been in few, US Navy in Hawaii & San Diego- USS Denver & Missouri, Republic of Mico Navy in Matamorous & of course, Her Royal Majesty QEII Navy. Here are some Pictures of RN EURYALUS, Its CHIPS for Chits Deal.

http://www.geocities.com/tsvondrashekmd/ HMS_EURYALUS_RN.html 

Christ thens theres Army , & Air Force Bases, about half dozen, Right Now I'm living on Bolling Air Force Housing, so I just might B2 5B You.

hahaha.Stay away from Tarmack.

Also I'd Like to Cross post about 780i SATA Raid- With Ultie Raid 5 speeds of 100 mb/sec are too fast, its more 10 to 20 mb/sec Ultie or you get plenty o' blues. So if C.M. meant Flat out, try slower harddrive mb/sec & it should clear.T Stewart Drashek

Signed:Admirals' Admiral ULTIE TOM