Since the Symbian Foundation is committed to using Mercurial as its SCM (DVCS) I have been looking around for tools and training notes to get up to speed since my tools involve Subversion + Tortoise (personal) and Perforce (work).

The best reference I have found so far has been this

(http://blog.medallia.com/2007/02/a_guided_tour_of_mercurial.html)

But today O'Reilly announced they are also bringing out a new book for Mercurial and there are review drafts avaliable at this link

http://hgbook.red-bean.com/