Yes, we’ll be there - and it would be cool to meet you at FOSSGIS. Almost all members of the OSM community are hobbyists, including many of the speakers at the conference.
Regarding the different preferences for modelling software expressed here, it would be good if we could pick a format that works well for both Sketchup and Blender users. Blender, due to being open source and working natively on Linux, is a natural fit for an open community, but it is also hard to use. With Blender being our “JOSM”, it would be great to have Sketchup as our “Potlatch” - a simple editor usable by everyone. The license issue sounds unpleasant, but I wouldn’t form a conclusion without looking at it more closely.