Just received my 3rd auto CLI from Chase in 1 year and thought I would share. This is my first and only major CC and I run all purchases thru it and PIF every month.
Aug 2009 intial CL: $3,500
Sep 2010 CL: $5,000
For me they came at 3, 6, and 12 months.
Congrats! I've yet to see one. 
(love your siggy, btw --plenty of other icanhascheezburger people around here!)