This is really a fantastic idea... partners should be lining up. More and more services have http hook support, but I'm sure people don't want to (or don't know how to) run a server just to turn, say, a json callback into an e-mail that goes to their sales department. Similarly, all of these companies building callbacks don't want to provide a custom scripting environment / rule editor for customers to write this code. Seems like a great bit of glue.
The documentation assumes I know why I would need to do this. This sounds kinda cool but as someone who wasn't already fully aware of CloudMine won't understand this press release.
If the goal is to announce platform expansions to draw in new people you'll need to paint the problem-space a little clearer. Tell a story.
Ditto... From the demo, it looks like it's simply remote logging the data to cloudmine. I'm sure it's doing something cooler than this, but I don't quite see it.
The idea is that you can now have 3rd party services interact with your CloudMine powered app from the server side. From there, you can update data/state, send push notifications, or do whatever makes sense for your app.