Shyheim was the youngest member of the Wu-Tang Clan back in the day (check the Live @ Madison Square Garden performance with Biggie, and Big Daddy Kane MP3).
last i heard from Shyheim he got outta jail, and did a new album "Greates Story Never Told". He had a few tracks produced by RZA on that... ever since then i havent heard anything about him.. but i did find this interview, where he talks a bit on Rza and the Wu.