It's been a long time coming, but the PlayBook has finally been rooted. Devs neuralic, xpvqs and Chris Wade have been hard at work and have finally discovered a persistently exploitable hole that enables unfettered root access to the PlayBook. The culmination of their efforts, DingleBerry, hasn't been released just yet, but it should be hitting the series of tubes in the not too distant future. Obviously having super user access opens a world of posibilities to developers, but there are some immediate advantages too.
Engadget, BlackBerry PlayBook gets root thanks to childishly named DingleBerry tool