We're talking about the 1.6L (at least I was).
The turbo cams were first introduced in the July issue of NPM
http://www.nissanperformancemag.com/.../project200sx/
These have recently been prototyped (not available to public yet). Harris81 you're right, the S3, S4, C1 cam profiles have been out for quite sometime for the 2.0L.
The JWT 1.6L cams are still fairly new* (in production for nearly 2 years:
http://www.sentra.net/project/scc-09-01.php? )