BlackBerry App World doesn't currently offer any decent Twitter for PlayBook applications—you'll want to keep any eye out for @Blaq, though. But that doesn't mean you need to hold off on tablet tweets; thanks to the Hahlo
Twitter Web app, which is optimized for iPhone but also works well in a variety of additional browsers, such as the PlayBook's Webkit browser, RIM
tablet users have access to all the basic Twitter functionality via a streamlined interface, including tweets, mentions, direct messages and lists. And you
can create a Hahlo home-screen shortcut for speedy access to the "app."
Visit Hahlo.com and login to your Twitter account for access.