Of course, we know that iPhone OS 4.0 is due out sometime soon, and because the new OS features will only work on the current 3GS model so far, it's not a stretch to think that Apple is prepping a brand new iPhone. A new handset has long been rumored to work on Verizon's network, but this would suggest that even if it is spread across multiple carriers, AT&T will have it for sure.
We'll keep our eyes open as usual, but if you were planning to buy an iPhone and can wait until June for a new model, that's probably a good idea.
*Verizon is currently in the process of acquiring AOL, Engadget's parent company. However, Engadget maintains full editorial control, and Verizon will have to pry it from our cold, dead hands.