[biggitybones]

I second this - 1 click signup is huge for a competitive market like project management apps.

I do something similar to Balsamiq for one of my apps - it keeps a high contrast "Save Progress" button at the top of the screen, and any time the user does one of a few set actions (for you, create a project or to do list) I pop up a modal to ask for their email and password to save their acct.

In addition to greasing the sign up process, it gives you an idea of your market fit - the data you collect around this "temp user" process is very insightful.