It'd be really nice to be able to share images (i.e. snapshots that we've taken) with other accounts by "inviting" them, or simply entering in their DigitalOcean e-mail address, which would then send them an e-mail letting them know (or perhaps a special DO pin #). This would especially be useful if you're working with a developer/administrator or even a business partner and you want to share a setup/configuration.
As an example, we just configured a rather time consuming LNVMP stack (CentOS, NGINX, Varnish, MySQL, PHP-FPM) and to prevent us from having to continually do the exact same setup on every single server, we took a snapshot so we could rapidly deploy it. The issue here is that only I have access to this snapshot; if I could "share" it with others who also manage deployments, they too could use it and thus speed up future deployments.