Toshiba is rolling as we speak a software update to its Excite AT305 (the 7.7 inch tablet) which brings Android 4.1 JellyBean operating system. According to Toshiba‘s email notification the update is available since December 20th and it is aplicable to the following models include: Excite AT305-SP0261GM, AT305-SP0260GM, AT305-SP0201GL, AT305-T64, AT305-SP0201L, AT305-T16, AT305-SP0261M, AT305-SP0260M, AT305-T32.
Some may not see the notification for JB if your not on Android 4.0.3 so before looking for Android 4.1 make sure you’re on Ice Cream Sandwich (version 4.0.3). The new software is available OTA (over the air) and it should bring your tablet to firmware build 4.1.1000121313.01.
source ToshibaThrive Forums