Rachel K on Oak Street and Kiva Salon near Water Tower. Prefer Kiva as they're less expensive and do a good job.
Chicago HairCare in Lakeview/Wrigleyville offers this service at $100 per hour depending on your hair length/thickness. They were one of the first three salons offering it two years ago.
You should go to Thomas West Salon and request Dayna. She does the Coppola Keratin treatment, which is safe!!! It has changed my life...She is great! She specializes in curly hair and also does the Japanese straightening, also.
Sine Qua Non Salon recently started offering the Brazilian Keratin Treatment. As of right now, first time treatments only cost $250 and it includes the treatment, blowout, and a free bottle of sulfite-free shampoo.