Gordon's Tech: Will Apple abandon Aperture?So version 2.0 is out and, yes, you can edit the dates. I don't see any batch editing but I'm not an Aperture expert. At least there's something. The product is not dead yet.
... You can't edit date metadata, you've never been able to edit dates, this hasn't been fixed despite several major updates...
Still no Apple Help file. They must have a pretty limited development budget.
Once I figure out a solution to the .Mac bug I'll start using it over the next two weeks. The date issue was my primary objection to moving to Aperture -- it gave me a worrisome impression of the product manager.
PS. Surprise! Academic licenses cannot upgrade. Going forward the academic discount isn't worth it with the new pricing.)
Update: You can AppleScript date modifications, so there's no problem with batch updating!
Adjust date and time of version/master
The “adjust date” verb has been added to the AppleScript Dictionary, allowing you to modify the EXIF date of images through a scripted workflow.