I have just released version 0.3.0 of MetrO for the BlackBerry, adding an assisted text entry feature:
Complete information and a download link are available here.
Please note that this is still beta software. If you don't want to take any risk with your data, please don't install MetrO on your BlackBerry yet. If you do want to participate in the beta phase, please report any issue you may encounter, providing as much detail as possible (and accept our apologies). Thanks in advance!