Agreed. Hipmunk tries to be a good interface when there are a dozen similarly priced flights to choose from, but in my experience, there is one carrier with good prices and good connections for a given route, and then choosing which of their two flight options for a given day is easy enough with Kayak's tools.

exactly. also http://momondo.com and http://skyscanner.net

But on mobile https://market.android.com/details?id=com.hipmunk.android "This app is incompatible with your Play HTC HTC Wildfire.". Well, all other work, I don't see a reason why a form to search results via an api shouldn't work on ANY device.

Agreed. Although I really like Farecaster on Bing. To me, statistical analysis of historical prices is a lot more important to visualize than travel times.

I like Kayak, too. Hipmunk is neat, but it's almost too slick. I essentially want to know the price, departure time, and arrival time. Everything beyond that doesn't really add much. What I'd love too see is something that simply allows me to see the cheapest flight between too points without having to put in the travel dates.

Without dates, do you mean you're flexible and you just want to see the best price in the next 60 days or something? Kayak explore might work (kayak.com/explore)