Windows 8, Phone 8.. Dates
We have known for a while now that the retail availability of Windows 8 will be on 26th Oct. So it should not be a surprise to have a big launch event on 25 Oct by MS to make the formal annoucement.
MS had also showcased Phone 8 in Phone summit, but what was not known so far was the launch date for the same. Some of the dates are now being made known. Read here. Even if Phone 8 doesn't launch on 29 Oct, given that the BUILD 2012 Conference starts the next day, we can expect Phone 8 to definitely get showcased there.