With the abrupt stop of the mating dance between Microsoft and Yahoo we can talk about other questions about the future of the online ad business.

Here are some of mine.

For social networking: How much will eyeballs however measured sell for on social networking sites—will they be more or less valuable than the average today? How close are we to having an online advertising model for social networking that makes sense for advertisers, members of these sites, and site owners?
For search: Google seems to have pretty much conquered search on the PC for now. Will it lock up mobile, where lots of eyeballs are going to be going in the next few years, or does this provide the best opportunity for someone to take Google on in search-based advertising.
For display: Behavioral targeting gets so much hype you’d think computers were spinning masses of personal data behind lots of ads being served. That’s not true today, will it be, and when.

And, finally, how much online advertising can a human really stand in one day? I await your answers to any and all of these, neutral and obviously unloaded, questions.