Unstyled columns

NameAddressCompany/Guild
Nanny BilletAgatean EmpireFools' Guild
Nanny CarrotQuirmAssassins' Guild
Nanny CarrotSto LatFools' Guild
Nanny CarrotAnkh-MorporkClacks
Nanny CarrotSto LatPost Office
Nanny de WordeÜberwaldActors Guild
Nanny de WordeÜberwaldThieves Guild
Nanny DunSto LatThieves Guild
Nanny JimmySto LatBeggars' Guild
Nanny KingKlatchPost Office
Nanny KingEphebeAssassins' Guild

Styling using only colgroup (Looks most correct in IE)

NameAddressCompany/Guild
Nanny BilletAgatean EmpireFools' Guild
Nanny CarrotQuirmAssassins' Guild
Nanny CarrotSto LatFools' Guild
Nanny CarrotAnkh-MorporkClacks
Nanny CarrotSto LatPost Office
Nanny de WordeÜberwaldActors Guild
Nanny de WordeÜberwaldThieves Guild
Nanny DunSto LatThieves Guild
Nanny JimmySto LatBeggars' Guild
Nanny KingKlatchPost Office
Nanny KingEphebeAssassins' Guild

Styling using only CSS 2.1 selectors (Doesn't work in IE6)

NameAddressCompany/Guild
Nanny BilletAgatean EmpireFools' Guild
Nanny CarrotQuirmAssassins' Guild
Nanny CarrotSto LatFools' Guild
Nanny CarrotAnkh-MorporkClacks
Nanny CarrotSto LatPost Office
Nanny de WordeÜberwaldActors Guild
Nanny de WordeÜberwaldThieves Guild
Nanny DunSto LatThieves Guild
Nanny JimmySto LatBeggars' Guild
Nanny KingKlatchPost Office
Nanny KingEphebeAssassins' Guild

CSS 2.1 selectors and colgroup

NameAddressCompany/Guild
Nanny BilletAgatean EmpireFools' Guild
Nanny CarrotQuirmAssassins' Guild
Nanny CarrotSto LatFools' Guild
Nanny CarrotAnkh-MorporkClacks
Nanny CarrotSto LatPost Office
Nanny de WordeÜberwaldActors Guild
Nanny de WordeÜberwaldThieves Guild
Nanny DunSto LatThieves Guild
Nanny JimmySto LatBeggars' Guild
Nanny KingKlatchPost Office
Nanny KingEphebeAssassins' Guild