Schools or Universities Sponsoring H1B visas?

Hello,

I recently discovered 2 good services that help you find a sponsor to teach in the USA:

www.visalista.com and www.h1visajobs.com

Have you used them before? Do you know any other service similar to that? I am so far happy with them since most of the companies out there just help IT people but I was looking for someone helping educators.

Any help?

Thanks!