Here are some links that we hope that you'll find useful; well OK, there's a bit of self promotion as well!

EX5Tech The number one web resource for the EX5, and one of the friendliest support sites on the Internet.
Yamaha Forums UK A great and friendly site for a wide variety of Yamaha synths including the EX5.
Synth Zone A great "launch" site for all sorts of synth resources
x.factory Librarians The Website for Derek's Java librarians for classic Yamaha synths, including the EX5
Split Third Studios Torus's Website. Torus kindly did the graphics for the MarcE tributes, which are used with acknowledgements on this website.
Serious Mastering Fuse mastered the MarcE tributes and MarcE's new album "Morphine Part I"
Echoes The Website for Derek's classic/progressive rock band
Carreg Ddu The Website for Derek's Celtic/New Age band
Welsh Floyd The Website for Derek's Pink Floyd tribute band