Our colleagues in Microsoft Switzerland have published a comprehensive hands-on-lab that explains in detail everything you need to get started with creating Silverlight 2 applications using Blend 2.5.
You can learn more and download the project files from here: Silverlight 2 Beta 1 Hands-on-Lab
They cover a lot of great topics including templating, isolated storage, and more. Beyond just talking about it, they provide actual projects for you to play with. They even have a Deep Zoom collections demo:
If you are looking to make the jump into Silverlight 2, then this lab is a good place to start!