I have read on several forums on the internet (Dave´s etc.) and you might want to contact ESL Dewey. I have not used them before but I´ve seen good things about them on many forums. I´m thinking about going to China or Taiwan later this year. I hope this helps.
I worked for Season Art in Taichung and I loved it. They make you work hard...but they really care about the kids and the quality of the teaching. I´m a trained teacher from Canada, and I feel like I learned more from working at that school than my teaching program.
Good luck Laura I am new to this as well but looking only for a short term assignment for the winter of 2009 and going forward every winter...I would love to get into a major hotel that would need me every winter to train their staff as I have the Tourism specialization.