Exporting XML is fairly easy task to do by hand, and Adobe provides sample code for ASP, CF and PHP that can be modified quickly to add you own recordsets into. Keep those around as snippets, or code template files in your code repository, and away you go.
I know that we've discussed an export XML extension in the past, but it just hasn't moved up in the list of products to work on recently. Of course, if more people were requesting it, that story might change.
What about the ADDT validation and log in functionality that makes them better for you? Specific instances are better than
We've certainly heard this one a few time, so I know that we've looking at doing something along this line in the future (sorry no timeline I'm aware of).