We just saw pictures of the BlackBerry PlayBook in portrait orientation last week. Now thanks to Chris Miller we have video of the PlayBook in that mode shown off by Paul Steel, Manager Technical Services, at Lotusphere 2011. Nothing ground breaking here but it gives you an idea of how the interface will look in this orientation.
Just skip to the video at 10:54m or so in to see it i action at this link!
H/T to Piotr @ BBNews for spotting this one!