The Dingleberry team has been showing off what exactly you can pull off with their Dingleberry exploit. Thom let me know that one of the Dingleberry devs, @neuralic, posted a nice video showing off how he got Android Market, Android email, and Android Google Apps onto the PlayBook. In his demo he is using an Android launcher and the Android Market installs apps like Astro file manager.
Google talk works and a other apps even with notifications built into the PlayBook which is nice. This is all being done on the latest PlayBook v2.0 developer beta which unlike the main release has not been patched for this vulnerability.
@neuralic also explains why some people may have been having issues:
I made a small mistake: the putty tool used to convert keys is called puttygen and is not included with dingleberry. You can download it along with putty itself at http://www.chiark.greenend.org.uk/~sgtatham/putty/. Use this to convert the file named "rsa" in your dingleberry folder to a .ppk file which putty and winscp and similar tools can use. You can then log in to your root with these tools using "root" as the username and the .ppk file that you made as authentication.
The instructions on how to enable google apps on the BlackBerry PlayBook can be found at http://pastie.org/2974406. I’ll make a video covering these instructions at some point.