According to Reuters, that is: 

"So Jay-Z took his time, and let his hair grow out — as he usually doeswhen he’s in the studio — and came back with collaborations withproducers Kanye West, No I.D. and Timbaland, as well as musiciancontributions from MGMT, Drake, Mr. Hudson, Rihanna and Kid Cudi. (Asof now, there are no collaborations with Beyonce, although he doesn’trule out the possibility.)"

By all means read the full interview if you want to hear Jay talk about Lil Wayne and hoarding shoes (let’s face it, there’s worse ways to spend a Thursday afternoon), but M-Jay-MT? That’s where the juice is.