[kuisch]

I think most travelers would probably fall in either one of these three categories:

Those that know where they'd like to go, how much they'd like to spend, and when they'd like to travel. (Traditional OTAs cater well to this category of people)

Those that know where they'd like to go and how much they'd like to spend, but don't know when they they'd like to travel. (e.g. When it would be cheapest to fly out; one solution that does a pretty good job of addressing this is Hitlist http://techcrunch.com/2014/02/07/hitlist-a-smarter-flight-fi...)

Those that don't know where to go, but do know how much they'd like to spend, and when they'd like to travel. (This would be the category we're addressing)

Along the 'where', '$', and 'when' dimensions, there would clearly be more combinations possible (i.e. 8), but the majority should fall in the three listed above. And sure, feel free to drop me a line at [e-mail] -- always curious to hear about how others are thinking about this!