Modeling a "Beijing Stadium"-like structure - Birds Nest

yesterday i wondered, how to model the beijing stadium

but after trying i didnt find the solution by myself :/ so thats what you get with 12 years industry experience..lol...then i found this brilliant tutorial by simon moire check this out!
http://simonmoir.blogspot.com/2010/12/design-by-many.html
i tried it and this is what came out..all a bit sloppy but the technique worked.

i hoped for a more accurate solution but you will learn something about nurbs, surface deform modifier and shapes. so interesting enough to give it a try!