I have it installed and running. I haven't noticed anything yet, other than my menus seem to be quicker. I used to have a very, very slight lag when going through Options, but now it seems more instant for me.
I thought about trying .230/.238, but I'd rather have all of my apps working. I'll make the switch when it's official and the app compatibility list is bigger...
I might be wrong here but I rember reading some where that RIM is releasing some updates. I guess there has been some issues with programing. This could be one of those release.