Yes, just last week I linked to a tutorial on Symfony 1.2 and Doctrine, but here’s another good one from Jonathan Wage (lead developer of Doctrine) himself: New in symfony 1.2: Doctrine goodies
In addition to some basics of setting up Doctrine and Symfony, he also covers a bit of the nested forms implementation that was recently updated in Symfony 1.2. Admittedly I didn’t think much of this feature when reading about it initially but seeing Jonathan’s implementation with translations was an eye opener.