Can the team creator give up admin rights on the team without resetting her user? I want to create a team for my employer so we can try it out, but I'm not the person they would want to be the admin if/when they adopt keybase.
They could also kick you out. I've done this a few times today. We reserved a number of team names for known tech companies, and when they've asked, I've created the team myself, added a couple of their managers as `owner`s, and then they've booted me.
You can think of the team's sigchain as just a string of signed announcements. You can sign someone else in as owner.
I think this demonstrates the problem of creating completely new namespace from scratch. One way to solve that would be to couple the team namespace to DNS namespace; to claim a team name you'd need to demonstrate the control of corresponding DNS name, same way as you do for DV certificates. Of course I can understand that you'd want to support teams for organizations/groups that might not have their own domains, but you could support such cases by creating a "pseudo-TLD" (or just straight up buy your own TLD), for example .keybase.