Microsoft has released the final set of training materials required to get your CRM certifications up to the 3.0 level.
Extending Microsoft CRM 3.0, Course 8531
This material will assist you in preparation for the Extending Microsoft CRM 3.0 exam.
Good luck.

 
This is a revision to an article from March, 2006.
My current project developed a requirement to display the Contact information on a tab on the Opportunity Entity.  Pretty simple, I thought, just create a new tab, throw on an iFrame and put a reference to one of the CRM pages that will display the contact […]