We know Sprint will be getting a WiMax 4G BlackBerry PlayBook sometime this fall. The 4G PlayBook was supposed to be released this summer, but RIM has mentioned it could be postponed. The coming soon page for the Sprint 4G PlayBook takes you to another splash page for the WiFi-only PlayBook. What is interesting is the highlighted bubble that says the offer to purchase the WiFi-only PlayBook ends on September 8th.

Lets hope this means Sprint intends to promptly release the 4G PlayBook sometime around then. Sprint would have until September 22nd to rollout the 4G PlayBook by ‘summertime’. When do you guess Sprint will make the 4G PlayBook official?