All they have said is that they're not showing it at MWC, so it's probably a few months away still.
About whether or not it "makes sense" to get a Nexus... Well, it's the only (official) way to get the pure Android experience (you won't get that with the SGS3 unless you flash a custom ROM), with earlier updates to new versions than any other phone.
Worst part about Android, btw. I will only ever get stock Android and that limits me to the Nexus phones
So guys, what would you consider too much money for buying a used Galaxy Nexus (Verizon)? I'm hoping I can get one for $500 dollars.
Also to summarize what I'm going to do:
1. Buy Galaxy Nexus first.
2. Sell iPhone after I get GN.
3. Hope I break even.