Danielafrenchfan posted a new video on Youtube, but it's in French and 99% of the video is about other people than Guille, so just ignore it if you don't speak French and you're interested only in Guille.
It's a "best of interviews" made during RG 2003 for the French TV and they show Guille twice:
(he tells the story when he asked for Agassi's shirt after the match and they show Reyes coming to the locker room to ask him if he doesn't prefer the racket -> not very interesting, but at least it's right at the beginning of the video)
(in that one, he talks about his doping suspension - but it's in the middle of the video. I recommend it for the many Lleyton fans though, he & Kim are adorable.
+ many other players, the Frenchies, JCF, Moya (he is asked about the fact that he is on some "Most sexy people" list and answers people wouldn't care about him if he wasn't in the top 10), Gonzo (the journalists are delighted because he's so much friendlier than Rios), Verkerk (the journalist is shocked he says he's ugly because she finds him so attractive) etc. This kind of stuff - you won't miss much if you don't get it.