Age of Yishmael When He Died - 137
Just thought about this:
The Torah says that Yishmael died at age 137. Multiply by 10 and you get 1370.
Muslim Arabs conquer Yerushalayim in 638 CE.
2009 - 638 = 1371.
(OK, I haven't thought of a good reason for multiplying by 10 yet, but I'm working on it.)
Update: See this Keitz Meguleh post for a different take on this which takes the Crusader era into account.