You can download drupal-8.0-alpha3 or clone Drupal 8 in git:
git clone --branch 8.x http://git.drupal.org/project/drupal.git
The Drupal 8 code freeze deadline is quickly approaching, which means that time is running out to make API changes. After the code freeze deadline, we enter Drupal 8's polish phase -- the home stretch of Drupal 8 development where we will focusing on fixing bugs and moving Drupal 8 toward the first release candidate later this year.
This means that we need your help to get the word out there about Drupal 8! Help the community get ready for Drupal 8 by talking about it at your local user groups, meetups, and camps. Pick a Drupal 8 topic that you're excited about, or try presenting on one of these topics:
webchick put together a great slide deck all about everything you should know about Drupal 8. Anyone is welcome to use, share, and update this presentation. It was last updated in April, so it should be mostly accurate, and swentel has also created an updated version in a Google doc. Post issues in the sandbox queue to help us keep it up to date.
The Pants module provides a tutorial for upgrading contributed modules from Drupal 7 to Drupal 8. The tutorial was originally created by webchick for DrupalCon Sydney, and effulgentsia presented an updated version as a live demo at DrupalCon Portland. If you're interested in presenting this as a session, effulgentsia can help you prepare the tutorial.
If you have any questions about either presentation, or if you notice anything that needs to be updated, contact xjm or effulgentsia. And, if you do plan on presenting on one of these topics, please let us know! We're keeping track of which camps already have sessions on these topics. The goal is to cover these topics at every Drupal camp until DrupalCon Prague.
See the event calendar for upcoming Drupal 8 content!