After exactly one year (hello expired warranty!) my NC-11 have died. There is a loud crackling sound when the cable is moved, making it anything but a noise-free experience.
I only know of the Sony noise cancelling headphones. Are there any others worth looking at? I mean something in an earphone/earbud style, not a full set of headphones that covers the ears and has a band and all that.
Since I will be in Japan in 3 days, I can pick them up pretty cheap, too!