I haven't played with IPB 3.x yet so I'm really unsure about the file structure with regards to folks ADDING mods, etc... I'm guessing certain files would be overwritten with the "update" files, therefore rendering the mods "broken"... as well as the board itself.
Looks and sounds great! You folks keep looking ahead - which is why you should be in business for quite some time to come. Something like this REALLY appeals to me and I'm anxious to test it out and of course.... see the pricing!