Google Docs in Plain English - CommonCraft
LiveBinder - collection of Google-related resources for educators
Google Tutorials - from Richard Byrne, FreeTech4Teachers blog
Collaboration Wiki - dedicated to Google Apps
Kathy Schrock's Google Blooms - Aligning Google apps to Bloom's Taxonomy
3-Day Professional Development Wiki covering Google Apps (other resources included in the navigation bar)
Ideas for using Google Apps in your classroom:
Google Docs to create, store, and share collaborative lesson plans
Google Forms for student surveys, parent information, and assessments
Google Calendar to organize your classroom, grade level, and school events
Google Sites to create a class website
Blogger for your class blog
Google Earth to create an interactive book map, or to plot the places of an historic event
Google Maps to practice geography and map reading skills
Google News for current events
Picasa for picture sharing, story prompts, vocabulary development
Create a Googlie - an electronic portfolio of student work
Googlize your lessons