Although cloud storage fabrics are very cool, a lot of multi-tenant applications will be build against a database. Based on some work we did on our super famous sample application LitwareHR :) , we just released a blueprint providing guidance on writing a SQL Server based, single instance, multi-tenant data access layer. (thanks Michael for the blueprint framework) Here is a short video introducing the MTDA blueprint. Interviewer: Michael, interviewee: Eugenio MultiTenant Data Access (MTDA) S+S Blueprint Released Enjoy and let us know what you think! P.S. Note that if you already have the S+S Blueprints Manager installed you can get this Blueprint by updating from the RSS feed. If you want more information, you can visit the MTDA codeplex site: http://www.codeplex.com/mtda