Summary
Role Centers that are delivered with Dynamics AX are a great starting point that you can then extend out to match your business. This could be by creating entirely new Role Centers, adding more content to use them as a central place to view everything that is important to you, or by taking Role Centers out of Dynamics AX and using them either as standalone portals or embedded portals in other applications.
Since Role Centers are based on SharePoint technologies, there is so much more that you can do to customize the information that is delivered through them. Other examples that you may want to try include:
Adding document libraries
Adding links to external websites
Adding internal navigation links to Dynamics AX applications
Also, if you want to do some development in Visual Studio, you can take advantage of Role Center project templates that get installed with Dynamics AX. They will allow you to create your own Enterprise portal web parts to display custom data views within Role Centers...