I spend too much time surfing the internet these days. One of the most interesting sites I've found is the The Quilt Index. It's open to all (no membership required), is a wonderful place to get lost in quilts, and it is easy to browse. The site contains thousands of quilts (52,000+ at last count) from a huge variety of documentation projects, museums, and special collections, as well as essays about quilts and stories from quiltmakers. The array of quilts is overwhelming, so if you want to justify a little screen time, I would recommend that you start with Meg Cox's Guide to Getting the Most from the Quilt Index.
The Quilt Index is a joint project of MATRIX: Center for Humane Arts, Letters and Social Sciences Online at Michigan State University and the Quilt Alliance. The project has been supported in part by major grants from the National Endowment for the Humanities and the Institute for Museum and Library Services.