A Nokia venture called Nokia Ad Service indicates that Nokia believes it has a big role to play in the mobile advertising market. It is apparently "bringing to market a solution that connects global advertising with mobile publishers".
It's hard to be sure, but I don't think this has been reported before. I heard about it during an interview with mobile firm Clicmobile at 3GSM this week, as they're creating an online/mobile social networking community for Nokia Ad Service.
I'd never heard of it, so I Googled, and got absolutely nothing. So I tried 'Nokia Advertising Service' and got one result: a LinkedIn profile for Minh Tran. And he has a public LinkedIn profile (i.e. one that non-members can read), which provided the quote above.
He's the head of sales, marketing and user experience at Nokia Ad Service, and was previously head of business development at Nokia Ventures Organisation (and before that was biz dev director at Bertelsmann AG).
It'll be interesting to see how this develops, anyway. Everyone wants a piece of the mobile advertising pie, from operators and web players (Google, Yahoo) through to the mobile agencies who've been trying to fulfil this middleman role.