Looks like there may be a new update to iOS to bring it to version 4.3.2 according to Boy Genius Report. The next version of the OS is supposed to be available starting 2 weeks from now and will come with several fixes. The patch will correct several bugs, security issues, and a few enhancements. No more information is given to specify exactly will be added with the update, more information will come when it is released.
However I am sure the next update will plug the jailbreak hole that is currently available on the internet.