New GBA SP model (Not the Micro)
I came across this on the Gaming-Age Forums and it appears to be legit. Nintendo has silently re-released the GBA SP with a micro style backlit screen. The screen was the only reason I was considering purchasing a GBAmicro since the super small form factor wasn't a selling point for me. This new SP is perfect in my opinion and now I'll stop using my DS as a GBA.
There are comparision shots of the screen on page two (linked) and you can see the box on page one: