We heard about aMail working on a BlackBerry PlayBook email client for almost a month now but it has yet to hit App World. My guess is RIM is holding up the app due to their SDK license that disallows creating email clients for BlackBerrys. Still it looks like aMail is working around App World. Todd noticed a thread on CrackBerry forums where aMail is offering their app as a sideload-able installer. This means you can install aMail on your BlackBerry PlayBook using the Development Mode sideloading process detailed by Keeper in our forums.
This sideload version of aMail comes with a 24 hour trial for you to kick the tires after which you can buy the program for $2.99 (beta test program rate). Its kind of a unique idea and definitely the first developer to document and promote sideloading apps on the BlackBerry PlayBook. RIM has foolishly not opened up OTA downloads for the BlackBerry PlayBook but hopefully they are reconsidering that annoying stance. Until then let us know what you think about aMail in the comments!