Google has packaged many of its tools into an offering for non-profit organizations. If your group has a 501(c)(3) tax status, and is not political or religious in nature, then you most likely qualify.
This is fairly neat. I worked with a library conference for several years, and much of what I set up for the collaborative and supportive workings for this group are included in the Google offering: an online workspace, communication tools (e-mail and group discussion), online checkout, and analytics to offer feedback on the website are all analogous to tools I set up for the group one at a time.
In addition, they offers Google Docs, Calendar, and Google Grants (which is basically free advertising on Google search results pages). For an organization like a Friends of the Library or a library-focused conference, these are tools that can take the work of a few people and turn out very professional, well-organized results.
If your group has a basic footprint on the web, but can see the benefits from increased collaboration and outreach, this is a fantastic offer that should be seriously reviewed and considered.
found via Official Google Blog