Does anybody actually use Google Now in here? Just got JB on my RAZR and it seems to work fine but no cards are showing up in my notification tray, whereas if I enter GN through my lockscreen, I have one for the weather and 4 package tracking cards (which is awesome, btw.)
Edit -- funny, as soon as I post this, here they come, lol.
I use Google Now extensively, and very frequently. I've noticed no significant decrease in battery life as a result of leaving it on, but the advantages for me have been more than worth it.
Weather -- including voice search "weather 98650," for example. I check them regularly for my photography work around Western Washington.
Traffic -- voice search directions to restaurants, etc. I look up restaurants briefly on my computer, and the notification with traffic delays shows up in the notification bar very quickly.
Appointments -- I have calendar notifications off, but Google Now's integration replaces it very well. The travel delays (i.e. 25 mins delay, leave now) have been very informative.
Sports -- I'm not a big sports guy. As such, seeing basic sports stats of the Seattle teams lets me stay somewhat in touch with their progress without watching the games.
Packages -- the Gmail integration is cool. I like seeing all my package delivery information in one place, especially now when I have multiple camera items shipping at once.
Public Alerts -- again, very useful in relation to my photography work. Easy view for blizzard and winter storm warnings in the areas I may shoot in.
The voice search (i.e. "navigate to x," "when did x die?," "what does x mean," etc.) has been increasingly useful to me as I get used to taking advantage of it when I have simple questions.