These are presentations from Symfony 2010 Day 1 (I’d name it “Doctrine” day).
Doctrine 2 – Not The Same Old Php Orm Very good introduction to next doctrine version (will be supported for only php 5.3 though, rewritten and improved Doctrine Query Language). I recommend to watch these slides before make decision about using ORM for next project.
Using Doctrine Migrations explains in depth how to use Doctrine migration tools. Very cool way to fully automate the migration and reduce fails percentage. I have not looked into that mechanism yet but looks pretty promising.
Here is also bonus presentation which was not added on official Symfony blog yet:
Using symfony events to create clean class interfaces
So next symfony conference day is coming and we are expecting even more interesting slides and news.