Find My iPhone has just been updated to version 2.0.3 and all Apple's saying is that it contains bug fixes and stability improvements.I haven't seen anything particularly of interest but I know I was experiencing crashes periodically while using it so we'll see if those issues are corrected over time.
We've had a few users reporting issues when attempting to sign into the updated version. One user said he was prompted to update to an iOS 7 beta before he could use the app. May be a one off issue and none of us were able to duplicate it. If any of you have any issues, make sure you let us know in the comments!