1=2 Radiohead Guitar Tablature: Tablature and chords for guitar and bass tablature. Includes lyrics and b-sides.
About Guitar: Accurate Kid A Tabs: Detailed tablatures of the entire "Kid A" album for guitar.
Guitartab.com: Radiohead Tablatures: Tablatures indexed alphabetically by song title.
Kabish.com: Radiohead Tablature Page: Guitar tablature and chords.
Radiohead for the Pianoforte: Hand-transcribed piano sheet music for various Radiohead songs in standard notational format.