eek! Just a reminder, if you are looking to understand more about Prism, I'd start with the WPF bootcamp resources I talked about recently (the '08 Bootcamp has a session on Prism). For those of you invested in some of the precursor CAB/Smart Client Software Factory, check out mszCool's post on Migrating from CAB/SCSF to Composite WPF Guidance aka Prism. A good read with this caveat from the author:

"Important note: please understand that these are my own, personal thoughts and that this is NOT Microsoft's official opinion and this is not an official Microsoft-statement at all!"