Now, this is cool!  Check it out. Add EasyBib to your Google Docs and students will never again have trouble creating a Works Cited page.  So excited!  In addition to the video below, here is a step-by-step simple process from the Google Help page.

This is probably not news to most of you, but just in case... In my opinion, the best website on MLA formatting, and the one many colleges refer their students to, is the Purdue University site.  Purdue OWL. Purdue answers all of your questions, and all of your students' questions.

Have you tried Sweet Search with your students?  It is a search engine where, "Every Web site in SweetSearch has been evaluated by our research experts. It searches only the 35,000 Web sites that our staff of research experts and librarians and teachers have evaluated and approved when creating the content on findingDulcinea. We constantly evaluate our search results and "fine-tune" them, by increasing the ranking of Web sites from organizations such as the Library of Congress, the Smithsonian, PBS and university Web sites."