New to message board, but MM, your site is incredible!

I am (hopefully) moving to Madrid in September and I am already starting to get a little nervous, mostly about finding an apartment. Does anyone know how difficult it will be to secure an apartment after the summer holidays? I spent half a year in Sevilla in 1999 as a student and knew I would have to come back to Spain one day. After two years in the investment banking world, I need to decompress. Advice or thoughts re: the apartment hunt?

Thanks from a girl in NY!