Here is the most current link for the bonus information for re-enlistment:
Bonus Messages from Armyreenlistment.com
You can get some serious cash for being a linguist!!! If you are a 3/3 you can receive an extra 7500 dollars on top of everything else!!!
Mostly only 35P on the list. :(
If you have questions, please feel free to visit the Frequently Asked Questions (FAQ) page.