The Ice Cream Sandwich update for Toshiba's 10-inch and 7-inch Thrive tablets has been pushed back yet again. Originally planned to roll in out in the spring, then later delayed to the summer, Android 4.0 is now scheduled to be available early this fall. While Toshiba's new Excite tablets are shipping with Android 4.0 already installed, it's unclear why the company has been slow to extend the updates to its older product line.