When RIM announced that the new BlackBerry 6 operating system was up to the carriers, that was all the information besides that should be available for the Bold 9700, Pearl 9100/9105, and Curve 9300/9330.
So far no carrier has really made any mention of supporting those devices with OS 6 in the future. T-Mobile did say that they were excited to support BlackBerry 6, but that was it. Luckily, we now have a leaked document that pins the Bell release of OS 6 to 2011.
This could be any date in 2011. Our guess is carriers will hold off as long as possible to officially release OS 6. This way they can push all the newer devices coming out that come pre-loaded with OS 6. It is a typical marketing trend. An example of this is the Bold 9000 just received OS 5.0 from AT&T!
Nevertheless, other carriers may release OS 6 before Bell or we may see it leak. Hopefully, users of the aforementioned devices will not have to wait too much longer.