First thing you need to understand is, there is no specific standard that all java based handset manufacturers support. Every manufacturer has a different way of implementation. Meanwhile Nokia came up with their S60 which was a good sucess and 80% of the market support this platform. Meanwhile they are working towards making it better. I dont think Nokia has a good reason to join OHA, as it is in competency with their S60 platform. Even Sony Ericsoon didnt join coz they use s60 and lot of their handsets are in the market with s60 now. Moto joined coz they are not standardized their platform yet.