I think the current focus on GSM over CDMA in the SmartPhone market space is really about the world situation. GSM is the legislated standard over most of Europe, and is used (but not legislated) in the USA, Austalia, and Japan. Thus, by producing a single GSM phone, a manufacturer is creating a phone which is useable all over the world.

On the other hand, CDMA is used only in Japan, Australia, and the USA, and even here in the USA, it is supported by a smaller number of providers (Verizon, Sprint, AllTel, Quest) even though that includes the largest provider of services (Verizon). A CDMA-only cell phone is therefore necesarily restricting its market and leaving out Europe entirely.

So, the philosophy among most SmartPhone manufacturers is "If we will only support one technology, make it GSM." Once SmartPhone companies decide to embrace multiple technologies, however, they always make CDMA the next on their list. Note the Handspring Treo which now has both GSM and CDMA models.