I am a fan of Andy Rutledge, both from his enjoying his blog and from the stellar work his agency does – including the excellent small CMS Unify that I heart.
He has recently released ‘Design Professionalism’ available online or as an e-book.
Read the foreword if you must and then go and get it.
Online, he is both a Platonist and a provocateur, a professor and a street fighter.
Jeffrey Zeldman