Hi John.
Love your list of features.
my two cents on this.
improved texturing tools: maybe we need to start small and slow so that new users don't get scared, but we have to start somewhere because we're talking about mostly pro users and somewhere along the line they will have to map something like a sphere or a bend cylinder. So start with the basics: box, cylinder and spherical mapping - that's pretty easy to learn and understand for anyone. Unwarping UVs is another beast but at is basics it's still selecting lines as seams and unfold the mesh into a plane based on the seams you've selected (i know there's much more to it but lets start simple). I think this concept is pretty easy to follow to anyone and a good base to start more advance texture tools in sketchup. (you're the guys that did "face me" components when everyone was using RPC characters, so i know you'll find a way to give your version of this "beast";) ).
improved Ruby Plugin management: This is not really related, but seeing this made me think, that in Google summer code a lot of new stff is developed for Blender, can't that be done for Sketchup too? And related to plugin managment, start at a small scale again, do a selection of free scripts every year that could be part of SK, ask permission to his creator and give credit to him in SK, and review, enhance, and update the code and use it in SK itself (for example, Freedo's surface tools you could use part of it like when drawing a circle if you press shift it will draw the circle directly in the organic surface, the same for JPP, this way it doesn't add more bottons to the UI and keeps things simple). joining more and better your developers with "our" developers, for the same goal.
improved performance: This will allways be a cat and mouse game for you. But If you think you've reach a limit in polys maybe you could try to give more stuff in ways to present models, Like better shadows, or shiny materials or lights (nothing fancy), and try to give a better performance there. And because we are talking about the pro version something that could use more professional hardware or better graphics cards.
improved import/export: I'm 100% for COLLADA, (a universal format it would be a dream). but you will allways have trouble with this because the problem it's not the future but the present, the people that need other options now and not when it's standart (this doens0t bother me right now because i'm using max and it has support for skp, but i've been there and can understand others). So your best bet here is make to pressure, help in better ways to turn Collada bet known and respect, show to everyone the beneficts of using, anything that can turn this process faster for everyone.
i have some more simple ideas for litle tweaks in SK but would like to hear your opinion in each of these topics.
And for when a basecamp in other countries?
Regards
David