Latt,
On my tame blackberries ...
I got mine at millernurseries.com
I picked the Illini Blackberry mostly because they said it had wild blackberry flavor.
www.millernurseries.com/cart.php?m=product_detail&p=39
Some tame blackberries just don't taste much like wild berries, but these actually do.
I planted 6 of them, about 5-6 years ago and they are still doing well and make some big fat berries that are very sweet and have wild berry flavor.
They are about twice as large as most wild berries and bloom and get ripe a week or two ahead of wild berries too.
I have been happy with them.
They do have thorns, and need to be contained to hold upright (especially when loaded with berries).
They do have thornless (upright) varieties that they say do not need to be contained or supported. That would be nice, but not sure how the berry flavor would be. I may have to try some of those next time around.
Good Luck !
TNhunter