I actually emailed them, and this is what I got back:
"Hello _____,
The Griffin case line for the iPod Touch is set to release near the end
of November. We can't take pre-orders, but if you contact us around
the middle of November, we can probably give you a more exact date.
Thanks for your interest.
Thank you,
R______
Griffin Technology
Technical Support"
Soooo... There you have it! End of November-ish.