Hi there,
I had an example for MVC2 but it not uses an example database (it uses one of mine), so I write down a tiny MVC3 example using Northwind. You can learn the basics from it.
It's not much different from MVC2 really. I use the default ASP.Net view engine (not Razor), no html5, just the basic stuff. You can add those if you want.
Also, in MVC there is not much different from LLBLGen and other frameworks. The default binder works very well with LLBLGen entities.
When you pass an entity from a view to the controller, the mvc binder pass the fields as form parameter collection. A nice addition is to tell MVC to pass an entity back and forth between the controller and the view, instead of parameters. To do that I used the Brian Chance's LLBLGenModelBinder class (http://www.llblgen.com/TinyForum/Messages.aspx?ThreadID=17343).
The DataAnnotations is very easy to add. You can do it in a partial class in you entity model project or via buddy classes. I added a few validation decorators to show this.
All you need to run this example is: Northwind db, VS2010, MVC3, LLBLGen v3.1.