The first 128 GB USB drives has been introduced by Kingston. It costs $546. The company also will release 32 GB and 64 GB versions. The costs of these two are $120 and $213 respectively.
A different company also made a 128 GB USB drive and it is over $100 cheaper than the Kingston brand.
The Kingston USB flash drives are Windows Vista certified and they also have Windows ReadyBoost features.
Source: Techtree

Articles
Blogs
Kits
Forums
Lee
Wow!
Any USB has readyboost : /
Actually i have a couple of USB drives that Vista says are too slow for ready boost.
Awesome…..
I have a 32GB Corsair Survivor, I paid 100 bucks for it… 8 months ago. works great!
whats the name of the other company that sales it cheaper?
I really just don’t see much of a need for a 128 gig flash drive. I can buy a computer that comes with a 160 gig HDD for less.
These 64s are now everywhere for around 100. Has anyone seen read/write issues after excessive use?
Continual reading and writing such as on a boot disk has been leading to high failure rates. I can not find out what the mean time between failure is.