Stewart Cink, seen here during the 2004 Ryder Cup tournament, will be on Twitter silence from his 1.2 million followers during next weekend's 2010 Ryder Cup.

When the 2010 Ryder Cup tourney commences this

SAN FRANCISCO — BlackBerry maker Research In Motion is jumping into the tablet arena with the ‘PlayBook,’ which will have a 7-inch screen and is designed for both consumers and business users.

“This is an ultra mobile, always on, ultra thin device,” Mike Lazaridis, co-CEO of Research In Motion told