Welcome to Live Tweeting of #WPC12 from Toronto. Keynotes about to begin.

#WPC12 attendance officially at 16,000, 156 countries, 4,391 first timers, 63 10+ timers.

“@scottbekker: Steve Ballmer takes the stage at Microsoft #WPC12” Darker blue shirt than I expected!

Ballmer: Windows 8 is 'a HUGE opportunity,HUGE opportunity for our partners. Please note that.' So noted. #wpc12

Kurt DelBene, Office president, joins Ballmer on stage. DelBene: 'For the 1st time, Office is on over 1 billion users desktops.' #wpc12

DelBene announces Office 365 Open program. #wpc12

Big (positive) crowd reaction to Office 365 direct billing at #WPC12.

Funny: Moderator asks about Yammer. Ballmer claps DelBene on the shoulder: 'He just spent some of our good money on Yammer.'

Ballmer: 'In the next 12 months, most forecasts are for 375 million new Windows PCs to be sold.' Implies mostly Windows 8 #wpc12

Ballmer on Surface: We may sell a 'few million' of that 375 million. Talks up OEM devices. #wpc12

Windows 8 on track to RTM first week of August. GA at end of October.

Weird, a significant product announcement at #wpc12

Reller previews OEM devices for holiday on #wpc12 stage.

Some of these are "meh".Reinforces my support for Surface move.

Reller: Windows 8 Pro upgrade from a new Windows 7 PC is $14.99 #wpc12

Ballmer reacts to microphone failure on #wpc12 stage. 'I will not be held down.'

Who I don't want to be: Mic guy at #WPC12. Doh!

Welcome to Live Tweeting of #WPC12 from Toronto. Keynotes about to begin.

#WPC12 attendance officially at 16,000, 156 countries, 4,391 first timers, 63 10+ timers.

“@scottbekker: Steve Ballmer takes the stage at Microsoft #WPC12” Darker blue shirt than I expected!

Ballmer: Windows 8 is 'a HUGE opportunity,HUGE opportunity for our partners. Please note that.' So noted. #wpc12

Kurt DelBene, Office president, joins Ballmer on stage. DelBene: 'For the 1st time, Office is on over 1 billion users desktops.' #wpc12

DelBene announces Office 365 Open program. #wpc12

Big (positive) crowd reaction to Office 365 direct billing at #WPC12.

Funny: Moderator asks about Yammer. Ballmer claps DelBene on the shoulder: 'He just spent some of our good money on Yammer.'

Ballmer: 'In the next 12 months, most forecasts are for 375 million new Windows PCs to be sold.' Implies mostly Windows 8 #wpc12

Ballmer on Surface: We may sell a 'few million' of that 375 million. Talks up OEM devices. #wpc12

Windows 8 on track to RTM first week of August. GA at end of October.

Weird, a significant product announcement at #wpc12

Reller previews OEM devices for holiday on #wpc12 stage.

Some of these are "meh".Reinforces my support for Surface move.

Reller: Windows 8 Pro upgrade from a new Windows 7 PC is $14.99 #wpc12

Ballmer reacts to microphone failure on #wpc12 stage. 'I will not be held down.'

Who I don't want to be: Mic guy at #WPC12. Doh!