Looks as though the latest BlackBerry Messenger has just gone live. Through BlackBerry Beta Zone, RIM had released v5.0.1.32 but, the live links to the update are showing v5.0.1.38. You can hit the BlackBerry Messenger link to download the latest version. BlackBerry App World however, is still not fully live as of yet although, it is showing so it'll only be a short while. Let us know if ya find anything new.
Download BlackBerry Messenger v5.0.1.38 Via OTA Today