Allt is so much more fun with lot of people in it. Inviting your team is super easy.
- From the profile dropdown (top-right), click on Invite People
- Enter just the email address of the person you would like to invite.
- If you would like to add more people, just click on Add more and a new form will popup for you automagically.
- Once you're done entering enough email addresses of people, just click on Invite Your Team.
P.S. Inviting a Guest is a feature that we are working on currently. We're looking at a release for this feature in a few weeks.