All of that code is based upon HTML/CSS, yes. When done, that's what it will be.

That library has a couple of issues. It is written in C/C++ and so does not easily work with Java, and would almost certainly restrict Mango's cross-platform ability. Second, it is released under the GPL license, which means it could only be included in the Open Mango product, not the commercial version.

I had made the assumption in my previous post that your instance of Mango would exist in your corporate environment. You are correct though: you can run an instance local to your machine. In fact, you can run machine-local instances and have them communicate with a corporate instance, but this would bring you back to your machine-to-corporate connectivity problem.

The remote graphical views will work, but the issue will still be connectivity: browser interfaces require TCP/IP networks. Assuming some internet connection is available you may still have issues with firewalls and such. However, Serotonin has some new software products to solve this problem as well. Instances of Mango behind firewalls and/or on internal networks can be made available by using a Serotonin tunneling agent.

If you have a corporate Mango instance talking to machine instances, you can do much better than just semi-daily. You can have near real-time updates. Check out the documentation on Publishers.