Use of Pieclient rendering on Blackberry - What's the deal ?

I was starting work on designing a webdynpro app for the blackberry, and found that by forcing rendering of the client to pieclient or even better - pie03 client - I had a better usage of UI elements than with the default wml rendering. The wml client does not render my tables (they dissappear) - but the pie03cleint does this just great (tables are populated and look pretty good). In looking through the elearning area, I found that the demos actually used the pieclient on the blackberry as well... Is the rendering of pocket pc client "pie03client" on the blackberry just and unofficially used item ?

Thanks for any thoughts...