[Lizard]

You can give multiple people read access to the file by exporting to an HTML Report and posting that on an internal website.

Right now, there's no good way to have multiple people editing the file simultaneously. This is a very popular request that we're seriously considering for an upcoming version. Depending on your exact environment, you might have some success using version control to check the file in and out, but you'll need to be pretty careful if you need to merge versions.