If you're talking about https://www.pagebox.es I see it as a good competitor to Trello (I always thought of using Trello's API to build a simple idea-tree note-taking app, but their trees have depth limits, yours don't, so I could use yours), but, at the same time, I don't know if your site will be up and online for a long time, so I'm not sure if it is secure to put all my data there.
We've never compared ourselves to Trello, it makes me think that we could make the nestable lists more explicit and promote this note-taking use. As for how long we will last, it's always hard to say, but we won't take down the server, and in any case be assured that before that I'll help everyone to take every byte safely elsewhere, via zip, sql dump, csv, spreadsheet, plain html + css, written in clay tablets.. I mean, I'll be your export module, If you need me to programmatically push it to other service with an API I'll do it, trapping the contents of someone else makes me feel terrible.
Now I'm thinking you could explore more the multi-useness of it. First, you expose an API for accessing the nestable lists from the browser (and other clients, but I like the browser), then various apps can be built on top of it, and they all could be accessed from the main site, such as:
- note taking
- server logs
- manual logs of events (I've seen these in use in lots of small business where some employee must log what happened in its turn)
- personal journal
- mixpanel-like thing
- analytics of any kind
- computer-generated logs of anything that doesn't need a full-fledgeded database and system of its own (I'm thinking specifically of the logs of people who used their password to open a dor we have in our building, that communicates via serial port with a server that stores that info, but very ineffienciently)
