AT&T has finally announced the launch date for their BlackBerry Bold 9900, Torch 9860, and Curve 9360. The 9900 and 9860 will go on sale November 6 for $199.99 and $99.99 on a two-year contract, respectively. The lower-end Curve 9360 will be going for a scant $29.99 on-contract starting November 20. The Bold 9900 and…