One feature that I think would be cool is if there was a way to associate a custom subdomain with a grain rather than the auto-generated stuff like "xh37vmw0h5276mj7h5eh.blah.company.com". Being able to host at "docs.company.com" makes link sharing a lot nicer for everyone!
Generally when sharing you send a link like "sandstorm.company.com/share/xh37vmw0h5276mj7h5eh" -- the random hostname you quote is actually an implementation detail that you weren't meant to see. :)
Once a user has opened a sharing link once, the grain will appear in their "shared with me" list, so they can find it again by going to sandstorm.company.com. We will soon support sharing by other mechanisms that don't involve sending a secret link, too.
https://d85snt1c8mqgrfxcd2o1.blah.company.com/gitlab/repo/bl...
Another issue with this is because of the navigation being done with frames, those URLs are somewhat hidden from the user. I have some thoughts on this, but they may be worth saving for the issue tracker as this appears to be an issue with the GitLab port and not Sandstorm itself.