They have officially added it to the "New for 2011" tab... DISCUSS.

Official specs:
Model Name J Mascis Jazzmaster®
Model Number 030-1060-(541)
Series Artist Series
Colors (541) Vintage White,
(550) Butterscotch Blonde,
(Polyurethane Finish)
Body Basswood
Neck Maple, C-Shape,
(Gloss Urethane Finish)
Fingerboard Rosewood, 9.5” Radius (241 mm)
No. of Frets 21 Jumbo
Pickups 1 Custom Vintage Style Single-Coil Jazzmaster® Pickup (Bridge),
1 Custom Vintage Style Single-Coil Jazzmaster® Pickup (Neck)
Controls “Lead” Circuit: Volume, Tone,
“Rhythm” Circuit: Volume, Tone
Pickup Switching 3-Position Toggle:
Position 1. Bridge Pickup
Position 2. Bridge and Neck Pickups
Position 3. Neck Pickup
(Lead Circuit)
2-Position Slide:
Up: Lead Tone Circuit
Down: Rhythm Tone Circuit
Bridge Adjusto-Matic™ Bridge with Vintage Style ”Floating” Tremolo Tailpiece
Machine Heads Vintage Style Tuning Machines
Hardware Chrome
Pickguard 1-Ply Anodized Aluminum
Scale Length 25.5” (648 mm)
Width at Nut 1.6875” (42.5 mm)