Looks like Motorola XOOM WiFi owners in the US are receiving Android 4.1.1 Jelly Bean (build JRO03H) update. This is the first device getting Jelly Bean upgrade without Nexus in the nametag. XOOM WiFi owners will be notified when Jelly Bean arrives for their devices but those who're impatient, can check for updates in Settings. In case you have other XOOM tablet, sorry to say but you’ve to wait little longer for Jelly Bean.
Source:- Android Central