Here is a blog post on Tropo's blog that explains how to use NuGram Server from Tropo.
http://blog.tropo.com/2009/12/17/advanced-grammar-topics-for...
Yes, this is a great example of how we focus Tropo on making things easy. But then also let you do the complex things like advanced grammars for speech recognition when you need to. Simplicity mixed with depth of features.
From it's companion site, nugram.nuecho.com, you can also download a complete Eclipse-based grammar development environment (NuGram IDE) from which you can upload your grammars to NuGram Server.
Regarding the opacity of the site, maybe we could work on that... We are very open to constructive comments!
--Dominique (Nu Echo's CTO)