Requesting an API call to find revision by date

There's no reason on my end not to do it, I just didn't want to put undue strain on your service. I mean, obviously, even a fairly popular Dropbox app's API calls probably represent an infinitesimal fraction of the bandwidth you folks push out on a minutely basis--and I doubt what I'm writing now will be "fairly popular," even if I do let it escape into the wild--but I try my best to write well-behaved software when I can, particularly when it's going to be using someone else's services.

If it proves to be too complicated a solution to implement, I'll just give up and go hog wild with 1000-revision API calls, though, sure ;)