Hasbro Pulse has sent out a email to those that have preordered The Vintage Collection Episode VI Return of The Jedi Jabba's Tatooine Skiff Vehicle stating a change with the ship date from 9/1 to 8/5. As for other retailers selling this item, Amazon currently has a ship date of 8/1 (tomorrow) and Entertainment Earth has a estimated date of 9/1 still, but I have a feeling that Entertainment Earth's ship date will change to an earlier date as well.
"Thanks so much for your recent order. We understand that you purchased the below product. E6060 - Star Wars The Vintage Collection Episode VI Return of The Jedi Jabba's Tatooine Skiff Vehicle