Bone still make music, but they are as always a mess of a group. Their first albums are classics for me though.
Twista is also still making music, Cham i dont know. Wu tang actually got some fuss around them when they made that "only one copy album" and i am pretty sure a new album from them would do ok now.
Its a new era now, not only sonicly and lyricsvise, but its not many labels who would back artists like Twista ect because of the drop in albums sales.
Still, if you were into Twista and Bone (like my self) i guess you also liked Tech N9ne and he sells better than ever.