Great project - I've been looking for a multi-blog CMS platform for a while.
A couple of first observations on the 0.8 release.
1) Under blog management - trying to remove a blog (http://localhost/orchard/Admin/Url.BlogRemove((string)Model.Slug)) doesn't appear to be working. Generates a 404 error.
2) Blog posts appear to have their 'blog root' url duplicate in the entry itself. - i.e. localhost/blog/my-first-post - will take you to the post title My First Post (from the list of blog entries) - but once the blog entry is open - the title link to the
post is now localhost/blog/blog/my-first-post.
Otherwise great stuff and looking forward to using Orchard on my next project.