Yahoo advertisers, get ready for moving pains. Microsoft's offer might be salvation for Yahoo shareholders, but Yahoo's advertising customers have plenty of headaches ahead. Yahoo has more display advertising customers on its platform than Microsoft does on its AdCenter. But because this deal is Microsoft's, don't expect Microsoft to move AdCenter customers to Yahoo's platform. Nope. Experts believe they'll be changing platforms. Again. Just like they had to do last year, when Yahoo finally introduced Panama. [Search Engine Land]