AASHE has a Discussion Forum for many aspects of sustainability in higher education, including Curriculum. You can post questions as well as respond to existing queries in your area(s) of expertise.
CSUN has an institutional membership to AASHE, and it is a great resource for ideas about sustainability on campus. Anyone with a csun.edu e-mail address can open an account that will give you access to the full site. Start from the Log In link in the left menu bar, choose Create new Account, and use your csun.edu email address!