Microsoft Dynamics CRM has come a long way since the original release back on January 2003. In case you were wondering, there was no 2.0 version as the product went from 1.2 to 3.0. The Dynamics brand was also introduced in the 3.0 release.
Microsoft Dynamics CRM 2011 (Released Jan 2011)
Microsoft Dynamics 4.0 (Released Dec 2007)
Microsoft Dynamics CRM 3.0 (Released Dec 2005)
Microsoft CRM 1.2 (Released Dec 2003)
Microsoft CRM 1.0 (Released Jan 2003)