A Hulu.com app--because I believe 90% of the people complaining about the "no Flash" stand are mainly worried about Hulu, and an app would mean 90% less complainers on Macrumors. Then Farmville, to take care of 8 of the remaining 10%.
Don't forget that Hulu means nothing outside the US. It isn't that much of a big deal overall.
In answer to the original question. I would like Settlers to be on a bigger screen, as well as the Guardian App, Classics, Underworlds, Blimp, Civilisation (as well as fix all the other problems it has),