Ron Jacobs compiled a great series of five ARCast episodes with a company doing a SaaS (Software as a Service) application. Have a look!
ARCast.TV - SaaS @ Work - Remend OverviewARCast.TV - SaaS @ Work - Remend Architecture OverviewARCast.TV - SaaS @ Work - Remend Architecture Drilldown on Workflow and ServicesARCast.TV - SaaS @ Work - Remend User ExperienceARCast TV - SaaS @ Work - Remend Database Architecture