We at Design Science are excited about the 2 new math domains in DITA 1.3. We'll have a booth in the exhibit hall, and will be on hand to talk with you about best practices for your publishing workflow, to answer your questions, and to show you the available tools for authoring, display and accessibility of MathML. If you're not able to make the conference, feel free to contact us directly at any time. 

We hope to see you in Virginia!