How Would You Reorganize An Application Service Delivery Model?

I have been thinking a lot about re-engineering the service delivery model for the application services team that I lead. I have been guiding my team to think about:

“We deliver the platform and work with the business to provide services”.

Our applications team is made up of subgroups aligned by major application services.  Here are the major applications:

  • Business Intelligence
  • Collaboration Tools
  • Document Management
  • Email and Calendaring
  • ERP (Student, Finance, HR, Doc Mgmt)
  • Identity Management
  • Learning Management Applications
  • Microsoft Applications
  • Oracle Database
  • Portal (for students and employees)
  • SQL Server Database

Currently, there are 3 teams in place in our Business Application Services group. Here are the roles in each team:

Support Team

  • Oracle DBA
  • Document Management
  • Business Intelligence
  • Project Management
  • Business Analysis
  • Identity Management

Email and Collaboration Team

  • Email
  • Calendaring
  • Instant Messaging
  • Collaboration Platforms
  • SQL Server DBA
  • Microsoft Applications
  • Enterprise Portal

Developer Team

  • Oracle Developers
  • Lotus Domino Developers
  • Microsoft Developers
  • Java/Web Services Developers

I am interested in hearing from any of you that lead groups with similar responsibilities.  Do you have a suggested structure for me to consider?  Do you split your team based on roles (technology domains)  or by application (vendor) platforms? Do you split operational work from project delivery?  Does your governance structure influence your teams organization?

Any suggestions are very welcome and I hope to learn from some of your experiences.  Thanks in advance.