That would be Qualcomm then because Nokia is using Qualcomm first. Said by Nokia's spokesperson as did Qualcomms so it can't get much more official than that. Nokia's WP might use U8500 later on, but Nokia hasn't said anything about that, just ST-Ericsson. And i very much doubt Nokia would use Qualcomm on their own project, neither is there any hint of that anywhere in the mailing lists. OMAP3 is still where my bet is like it has been for past 6 months.