UPDATE: The team over at BBH-Plus managed to extract both the BlackBerry Messenger 126.96.36.199 and BlackBerry Maps 188.8.131.52 apps for OS 6. They were available to download for a short while until the links were shut down. Most likely RIM reported to the hosting site to remove the download links.
The good news is - a few bug fixes were reported, and the leaked version of BBM is confirmed to fix the cursor bug in the app. So I can imagine that the pesky cursor issue isn't far off from being fixed in a official release. NOTE: These leaks were for OS 6 only. Here were the download locations. We'll update them if they show up somewhere else.