Windows 7、10/15 一般販売開始、10/23 プリインストールPC 販売か？

そろそろ徐々に情報が出てきていますね。
Thurrott: Final version of Windows 7 coming October 15

The latest prediction, this time from Paul Thurrott, is that Windows 7 will be released to the public on Thursday, October 15. But as he says, this is "according to the current schedule."

Meaning... "don't shoot me if I'm wrong or they change it."

The October 15 date gives Microsoft about 5 months to squash bugs left in the release candidate, which was released on May 5. This date also does seem to match up with the news we reported on last month, via Pocket Lint, that Windows 7 would be available for purchase on the Acer all-in-one Z5600 PC systems starting Saturday, October 23.

だそうです。