No ones knows..... You need to wait for the JB to be public.
Depending of what type of exploit it uses the update path can differ
All you can do for now is make sure you got your SHSHs saved, before Apple stop signed them, backup your iPhone with iTunes as normal and read Forums and Follow twitter for information.
Edit -- If you want to backup your jailbroken app, you can use apps like pkgbackup, and they will saved a list of installed app and them re-install all of them after the newJB, I personally don't recommended (specially after a dot update) since there is not generate that the apps you are currently running will run on the new version of the OS. IMO is better to install once by one in case one create a problem i will be able to identify it right away
PS: you can eat some cookies and get laid as well, highly recommend