gitref.org is great. Its concise enough to get you and your team started. You can then move on to progit.org if you want advanced info if you care about mercur

gitref.org is great. Its concise enough to get you and your team started. You can then move on to progit.org if you want advanced info if you care about mercurial (I do), hginit.com is great. It even provides a intro specifically for users coming from Subversion. you can then move on to http://hgbook.red-bean.com/ http://hgbook.red-bean.com/.