I read once where he said the reason why he hasn't asked Big Boi to do another album was because he just didn't have the creative juices for it, which I found surprising seeing how innovative they are.
I've always said they were probably the only rappers who could do pretty much anything maintain their street cred. Oh Yeah, is a perfect example. It has a 50s rock sound. Great song, but something you wouldn't hear from a rap group and still say they will still be loved by the streets. Kanye is the only person I know who could come kinda close and go into another genre of music.
Anyway, I'm happy to hear he's making music. I'm curious just like everyone else is. Mad respect for him.