on2it: How many devices actually exist for 900 WCDMA?
None.
How many devices will exist for 900 WCDMA by the end of 2008? I'd guess probably somewhere close to 50%+ of all produced WCDMA capable devices. Once manufacturers start using the newer dual band or tri band WCDMA radio's in products they will become the defacto standard much like quad band GSM radio's. The only question will be whether manufacturers adopt tri band 850/900/2100MHz chipsets over dual band 850/2100 or 900/2100 chipsets.