Interesting Interview of Oliver Bell: Developer Interest Fueling Open XML
ZDNet Asia recently interviewed Oliver Bell, Microsoft Asia-Pacific's regional technology officer. The story mentions Oliver's blog post on the value that custom schema support adds to the format. I can attest that I've had several conversations recently where customer's problems were solved by either custom XML parts that are bound to content controls, or embedded custom schema support.
In addition, Ian Blackley, sales engineer at TX Text Control, comments on the momentum of Open XML: "We expect a very high demand on the new OOXML format...We are already getting loads of requests regarding this format."