The development model for CRM 2011 has shifted from server side to client side. To extend CRM and to have the same look and feel throughout the application, it's better to have a standard style templates that we can put into the CRM 2011 web resources.
I have created a few templates that you can leverage to extend CRM 2011.
This is the first version of the style templates, I have included three html forms which they are the main CRM form, main CRM area form and the lookup form. I have uploaded screenshot of the templates on my blog. http://darrenliu.wordpress.com/