I actually just received an automatic credit limit increase for my Chase Freedom card from 1,500 to 1,800. I did not get any notification -- I keep track of all of my credit limits so I know when (and how much) they change by. 

Jun 2012 FICO® ~ 734 EQ
Sep 2012 FICO® ~ 684 EQ; 734 TU
Oct 2012 FICO® ~ TBA

Goal for 2014 ~760+

Trying to stay in the garden...but also trying to get as many apps as possible for now