I e-mailed Ionics a while back, and they mentioned May, but here we are in June... and no 2ghz plugs....
I wouldn't hold your breath. Many of us who bought the GuruPlugs (originally to be shipped in March, then April) are still waiting, having been charged on the day we placed the order. I have waited more than 10 weeks since they took payment, and they have not replied to my messages. Conclude what you will about GlobalScale, but I won't be recommending them to my friends.