Despite the original only being available for a couple of weeks in the US, rumours are already circulating regarding the next BlackBerry PlayBook.

We know that a 4G version of the QNX slate will be landing in the summer - but there are reports that a third PlayBook could be coming our way before 2011 is done as well.

A 10-inch version of the tab is being touted - one that is not a successor to the original, but a similar flavour only super-sized. Think Samsung with its new Galaxy Tab size line-up.

There's also talk of an updated OS, with BBM and an email client on board as well.

Pocket-lint has a man on the floor at BlackBerry's big expo in Orlando - so stay tuned for further developments on this story.