Cap One doubled my credit limit from $1,000 to $2,000. I found out through Credit Karma of all places. My scores also went up 20 pts for both TU and EQ. 
Starting scores: High 540's in June 2012
Current scores: TU 613 EQ 642
Goal: 700 club!
Congrats! Keep it up!
Starting Score: 526 EXP 09/2012 600 FICO 10/2012 608 EX (lenderpull)11/2012