Verizon also sells a Galaxy Tab 7.7 which is slightly different from inside (thus being called i815 instead of P6800 or P6810). Electron 73 has released a pre-rooted latest ICS ROM for galaxy tab 7.7 i815, which means you do not need to root it http://galaxytabreview.com/7-7/root/
Here is how you can install it on your Samsung Galaxy Tab 7.7 i815
Step 1: The ROM
Install with CWM
http://electron73.org/XDA/i815/elect…-LP11_i815.zip
Step 2: The MODEM
Flash with ODIN in PHONE section
http://electron73.org/XDA/i815/elect…i815_modem.tar
Step 3 (optional): Stock Recovery
If you want to be full stock afterwards, flash with ODIN in PDA section
http://electron73.org/XDA/i815/elect…5_recovery.tar
Step 4 (optional): Stock SBL
If you did all 3 parts above and want to be able to receive future Verizon OTA’s flash this in ODIN in BOOTLOADER section
http://electron73.org/XDA/i815/elect…1_i815_sbl.tar
This is a great way of obtaining permanent root on your galaxy Tab 7.7 who do not want to perform several steps just to attain root and run those cool apps.