The new 17-28mm FE is now shipping out in China. It will ship out this week in EU and US too:
In the USA at BHphoto, Amazon, FocusCamera, BuyDig and Adorama.
In Europe it’s available at Calumet DE, WexUK, Park UK and CameraTools NL.
Here are some unboxing pics from Fengniao:
Here is also a first look from John Sison:
Tamron 17-35mm F2.8-4 Di OSD gallery updated (Dpreview).
UPDATE: German review by Andy Grabo: