If i recall Do or Die is a labelmate or damn near it with Rap A Lot Records. Thats nothing new they did work on "Thugged Out" as well.
As far as Lil Moe im not sure, that came from left field. But Lil Mo has only put out one album as far as I know and only had one hit, she doesnt have as much pull in hip hop as other rap/r and b female acts like Eve, Missy, Alicia Keys.
So as I see it, Yuk is a much more talented artist than he is getting credit for still. I hope having them on the album leads to his sucess, but neither have major pull in the music bizz. Besides that, Id like to hear Yuk experimenting a little more with some of the Underground talent he has found on his last album like Louie Loc, Lil Ron, Phatz and others.