Considered tethering your Nexus? One of the good things coming out of AT&Ts shared data is that tethering is included. I actually have a Verizon capable iPad and prefer to just tether it than drop $20 for a month of bits when I may only need it sporadically. I have pretty much decided to just have phones that tether and use that for iPads, mini-pads, Nexii, and what ever else needs some data when I'm not near WiFi, rather than manage an assortment of individual pay as you go data plans.
Sometimes you are the anteater, sometimes you are the ant.