Here's some cool sites that GLIN just sent out to it's listserv. I really like the look and feel of the Wildlands League site, the logo is top notch and the design is really well done.
St. Lawrence River Institute of Environmental Sciences
Inland Seas Education Association (ISEA)
Great Lakes Inventory and Monitoring Network
Lake Superior Conservancy and Watershed Council
These are all excellent resources, I will add them to the left column here on Black Bear for future reference. Check them out.