It is the time to the beta 2, you are right Apple has released the iOS 4.2 Beta 2. It's getting closer to the final version as the time is approaching to November. Well since it's beta version which means this edition for the developers only.
It fixed some unwanted bugs found in the iOS 4.2 beta 1. If you are iPhone or iPad developers go to this link to download iOS 4.2 Beta 2.