I really love Trello, I think I could use it in so many facets of my life...but the nonstatements on its future (is it going to be monetized? is it even going to be around in six months? etc.) make me hesitant to really commit to it.
It's going to be around in six months, things that are currently free are going to remain that way, and we're not adding ads; I'll let you draw an inference on the monetization. I actually thought the Trello team had made that clear, but I'll bug them to see if there's a way we can make it even more so.
Edit: https://trello.com/privacy states the above clearly, near the bottom. I agree that slapping that under the "Privacy" page probably doesn't make sense.
(I work for Fog Creek; go through my comment history.)
But unless you're expecting only developers/programmers to use Trello, then saying "using the Trello API or just by appending '.json' to pretty much any URL" is basically worthless to most people. Our definitions of "very easily" must be enormously different.
True. On the other hand, it creates some level of trust since any programmer can now implement a Trello alternative for you to port your data to. So making the data available removes a lot of the lock-in. Of course, if the data can be exported in a format immediately usable by an application you already know such as some form of calendar this would be better. But I don't know of an application that overlaps sufficiently with Trello to capture the whole experience.