The mandown blog has a good overview of this weeks Adobe and ESRI talks. To sum it up, here is an excerpt from ESRI's press release : "Redlands, California—ESRI announces support for Adobe Acrobat 9 software and new geospatial capabilities available in PDF with the release of ArcGIS 9.3. ESRI has collaborated with Adobe Systems Incorporated over the past year to ensure a seamless workflow for geographic information system (GIS) professionals using ArcGIS who wish to widely distribute maps in PDF. Recipients of PDF map documents can find and display a location in the file using x,y coordinates as well as measure features directly on the map. This enabling capability enhances both existing customer workflows and creates new ones because recipients without ArcGIS can directly interact in new ways with maps using Acrobat 9." For more information, please visit the mandown blog.
Read more of this story at Slashgeo.