Last night at the DC Perl Mongers meetup we collaboratively built a proof-of-concept for storing key/value pairs as messages in a slack channel, https://github.com/plicease/globalhash. This was made straightforward by great Slack API docs and cpan:WebService::Slack::WebApi. Example usage:

# writes "hello=world" into the #globalhash channel
$ globalhash set hello world

# reads the #globalhash channel for the most
# recent value of hello and prints it
$ globalhash get hello
world

There are of course a TON of things you could do from here. Some ideas:

• More features: list of keys, delete, complex values, binary values, value history
• Clean implementation and better usage/error messaging, docs
• Port to other languages -- perl6 and still using the perl5 module would be fun
• Register as a slack app that anyone can use, fix up OAuth or whatever