Is there a Drupal equivalent of Google Groups and Docs?

You might take a look a OpenAtrium ( http://openatrium.com/ ) from Development Seed. This is a "canned" Drupal site that is designed for collaboration.

In addition, Acquia has a "Drupal Commons" product they are working on (but not available to the public yet). See:

http://acquia.com/products-services/drupal-commons

If you want to roll your own, a quick review of the Google groups demo indicated that you could set up something close using OG and some other modules. You'd have to look at how to theme OG "home" context types. For file sharing, I'd suggest looking at WebFM (plus a patch I wrote :) ) See http://drupal.org/project/webfm and follow the link the the "Slide Show" on the home page for details. For "pages", you probably can add a new content type and a view to handle that.

The only part that is hard is the "converse via e-mail". Part of the issue here is that this is not simply Drupal, but includes having an e-mail address associated with the group. I.e., when you reply via e-mail, it has to go somewhere. You might be able to use a "free" service for this, but often free services will not be reliable. Ideally, you need your own e-mail domain you can manage for this to work reliably.

Next, you'd have to make sure the system was "spam" proof. E.g., only e-mail from members allowed, etc.

That said, there is a Notification project that might actually do this called Mail Comment, http://drupal.org/project/mailcomment

Of course, it will be hard to compete with a multi-billion dollar business with lots of dedicated and highly paid resources that gives stuff like Google Groups away for free... :)

Thanks for your messages. I think it's hard to build a replacement for a good, free, reliable service. I'd just rather have folks registering on the Drupal site and working there.

For the nctech4good.org conference, we used Google groups and docs for committee and leadership planning, along with ReadyTalk and Doodle. It worked well, replacing face-to-face meetings, and I guess we'll do the same for 2011. I've started archiving 2010 resources (budget, event plan, final program, etc.) on the Drupal site at nccommunities.org/conference. nctech4good.org runs under nccommunities.org but we haven't figured out what we want to do with nctech4good.org yet, so it doesn't have much configured. I hope we can put some structure on nctech4good.org to build community before the April 15, 2011 conference. We did the conference registration on nctech4good.org using CiviEvent. Unfortunately, I didn't require that they register with Drupal.