I've created a FAQ category on the SQL Express Team Blog in order to help track answers to common questions. You can see all the posts that represent FAQs by clicking the FAQ link in the blog or by going directly to: http://blogs.msdn.com/sqlexpress/archive/category/6103.aspx
I'm starting to add some 2008 FAQs as the show up in the forum. Keep checking back for new posts.
SQL Server 2008 Express
Previous FAQ answers