[piramida]

You could add an option to export "task completed" events to a linked twitter account, so that it would say "ToDoneApp.com: Finished new website mockups". I can see that, even though todos are inherently private, some people will use that option, and it could become your source of new users.

[famfam]

You're right. I'm just stupid or lazy for not doing this. Personally, I would never use the feature, but I do know that some people out there live to spam their friends. :) I really ought to be taking advantage of it. Even though I don't think it could take a viral coefficient above 1.0, but it couldn't hurt.

Only possible issue is that the verb tense users enter a task with (in English at least) does not jibe with what would grammatically make sense to tweet e.g. task: "mow the lawn" -- tweet: "finished mow the lawn" I would need either turn it into past tense "mowed the lawn" or a present participle "finished mowing the lawn". You definitely want these export-to-social events to be light touch 0 or 1 click things, and not need the user to correct the tense of their verbs. Interesting problem.

[piramida]

Well, turn it around: "Mow the lawn: done with todoneapp.com". Better to avoid teaching computers semantics if you can :)