Nothing major, but maybe you can add this:
Above & Beyond - Their well-known remix of the song "M" has topped charts across the globe.
Armin van Buuren - A huge name in the trance world, he remixed Ayu's "Appears" for the Ayu-Trance CD
Chameleon - A term synonymous with Ayu's ever-changing fashion and music styles.
Darren Tate - Remixed Ayu's "Audience" for the Ayu-Trance CD.
Dirt Devils - One of the pseudonyms of Above & Beyond, they remixed Ayu's "Voyage" for Ayu-Trance III
Dumonde - Also known as JamX & DeLeon, these 2 have mixed Ayu's "Trama" for the Ayu-Trance CD.
DJ Remo-con - Remixed Ayu's "Evolution" and
DJ Shog - Remixed Ayu's "Depend on You" in 2003.
Goldenscan - Remixed Ayu's "Evolution".
H/\L - Created several remixes of Ayu's songs, including "Daybreak" and "Two of Us", among others. Also known to work with Ayu when creating several songs.
Koglin & Heath - They remixed Ayu's "Immature" for the Ayu-Trance CD.
Lange - Remixed Ayu's "Hanabi" for the Ayu-Trance II CD.
Megara - Remixed Ayu's "Real Me" for the Ayu-Trance III CD.
Moogwai - Remixed Ayu's "Unite!"
Push - Remixed Ayu's "Boys & Girls" and "Connected".
Ramon Zenker - Remixed Ayu's "We Wish" for the Ayu-Trance III CD.
Svenson & Gielen Known to have remixed Ayu's "Depend on You" for the Ayu-Trance CD.
Voodoo & Serano Remixed Ayu's "Fly High" and "Endless Sorrow" for the Ayu-Trance CD.
You get the basic idea