Jon Udell has an an article on the 'Ten things to know about XDocs', which is now officially called InfoPath. What I find most interesting is its supposed ability to generate XSLT visually. Also, it's interesting to see that they call it 'aggressively standards based'. Note there the 'based'. Just because MS-formats are now XML-based doesn't mean they are parseable by anyone. That won't happen until the DOMs are published, but I'm not holding my breath for that...