According to Cult of Mac, an Apple engineer (iOS division) has licked the battery issues with iOS 5.0.1. Expect another iOS over-the-air update for your iPad, iPhone, and iPod Touch. Early word on the street is that iOS 5.0.2 does not appear to be blocking the exploits being used for the iPad jailbreak. Jailbreak developers will likely be testing iOS 5.0.2 jailbreak exploits for iOS devices (excluding the iPad 2 and iPhone 4S).
Many (including myself) are patiently waiting for an iOS 5.0.2 jailbreak for the iPad 2 and iPhone 4S. My iPhone 4S is killing me without MyWi and my activator jailbreak settings, my iPad 2 is still jailbroken in an older version of iOS. Definitely wait to update to iOS 5.0.2 with your iPhone 4S if you are looking to jailbreak until word comes out from the jailbreak devs.
Siri is expected to be improved in upcoming iOS versions as well, getting some functionality to support other iOS functions:
Take a picture.
Make a video.
Turn on/off WiFi
Turn on/off BlueTooth
Maybe they can turn on Siri for the iPad 2 as well!