I agree with Anonymous and Kenneth Jespen about it being part of the Lifecycle. If lifecycles included approval steps/gates, that would fit our need *perfectly* and get our DevOps team out of the middle-of-the-night, click-the-button ceremony.
This appears to be in the latest version of Octopus Deploy.
It would also be great to add additional roles, such as Task Viewer, Task Runner, Task Administrator, etc.
I can think of a dozen other examples for this: URLs for other systems (like TFS or TeamCity), e-mail notification lists, new API keys, etc.