Not so long ago we were waiting anxiously for an OS 6 leak for the Bold 9700 and now we've had quite a few to play around with. The latest comes from BBLeaks in the form of 18.104.22.1688. Things seem to keep getting better as the versions go up, so give this one a go and report back in the comments and forums with your findings. Use caution when installing any OS on your device.
*OS Disclaimer - Please Read: Keep in mind this is NOT an official release and as such is not supported by RIM or your Carrier. If you choose to install, do so at your own risk and only if you're comfortable in the process of upgrading and downgrading your device software. It is quite normal during operating system development for certain features to be crippled or disabled while others are tested, and these beta builds often reflect that. They are not always better. Depending on your BlackBerry comfort level, it may be best for you to wait for community feedback on a build before deciding to download and install for yourself or simply wait for the next official release. If you require support, you will find it in our CrackBerry forums via our extremely knowledgeable community base - do not contact your carrier or RIM for Beta OS technical support (their first course of action will be to advise you to downgrade to a supported OS). *