OK, just called over to the Oidad Salon to get the 411 on this curly question (I don't have naturally curly hair so needed some help). I was told that you basically have two options to get waves:

1) Heat styling. Sorry, but to get soft, flowing and frizz-free waves out of naturally tight curls, you're going to need to prep wet hair with a smoothing cream and then blow dry straight with a flat paddle brush. After blowdry, wrap two inch sections of hair around a large barreled curling iron and then brush through once curls are cooled. 

2) Rake and shake. Basically, "rake" a relaxing fluid onto wet hair and shake it out. This is the next best option for waves but they won't be as soft and frizz-free as heat styling.