From twitter:
1. GT5 soundtrack coming soon, 2 cd pack
2. Someone complains about the photo mode lacking the ability to select multiple files at the time, Yamauchi says he would like that ability too
3. He answers to someone comments about the cars' great behavior even if rally mode and standard cars suck, and he says that cars behavior uses a new model in GT5. He then adds that he's starting to feel he wants a new steering device (?)
4. Someone says he plays almost only online, and would like some remuneration for online mode too (credits). The answer is it's under consideration, someday they'll add it through an update.
5. The reason for no face tracking outside arcade mode is not enough memory. He adds something about the pit stop function being excluded, but I'm not sure about this part without playing the game.
6. Someone says wouldn't it be awesome if there was a free-roaming mode in the cities where you would have to respect lights and speed limits, and you would be able to visit the stores you want. Yamauchi answers that it's one of the thing he wanted to do in GT5 but wasn't able to.
7. Boring comment about 5oul on d!splay (seriously?!!) being very popular in Europe.
8. Mechanical damage will come with the next update, early December (not necessarily December 1st).
9. Full support for G25 and G27 (with button configuration) will take a little more time, for now it's gt force pro only
10. Lounge function will be added progressively.
Sorry for the lousy translation, i did what I could.