Jonathan Wage has written an excellent post on the symfony-project blog titled
New in symfony 1.2: Doctrine goodies. In it he shows how easy it is to get a new symfony project up and running with symfony 1.2 and Doctrine ORM.

A lot of awesome stuff has been added recently to the next major symfony release, 1.2. Fabien has worked very hard to add without a doubt the most sophisticated features of any PHP framework that exists today. Not only are they nice features but he has implemented them in a OO way so that it is easy for me to implement the same features with another ORM, Doctrine. All this is done with very little work by me. So, give a big thanks to him if you enjoy this.

If you are interested in symfony or Doctrine, this article is an excellent step-by-step to get you going.