In order to import/extract data from tons of DWG files, I'd like to know experiences with ArcGIS Data Interoperability, and its strong points versus FME or GeoKettle.
Thank you very much.
Arcgis Data Interoperability Extension (ADIE) "is" FME.
Extended is a term that Safe Software uses to describe hooking or linking the software together.
My experience is that if you know the data well "dwg layer names, color assignments, object data, feature types/layers" you will be able to navigate and get some good usable data out with fme or the ADIE (easily).
But for interactive data browsing and export creation I prefer Map3d.
Also note that FME desktop for ArcGIS can be "extended to AutoCad Map3d. So you can import/export any of the types available in fme desktop directly from autocad as you can in the interoperablity extension.