Allow users to share calendars/invite others to events
It would be nice to assing/share tasks to another people we have in our "contact list". We can use @nickname when create the task and it will be visible on the nickname's taskboard (nickname will be the person we want for complete the task). We can click over @nickname and see all the tasks assigned to this person, like currently works for the #tags.
I think it will be a very important point, because it will be very easy to create task quickly and assing to our team work!
Also I have 2 accounts, one for work on my work email and one for home on my private email.
It would be nice to be able to remind me privately on a working todo
(take something to work in the morning etc)
I think this is really important too!