I don't personally know any foals by him but I used to own his mother. I actually bought his mother after seeing Where's Waldo at his foal inspection and really liking him. I inquired about him, but he was already sold, so I bought the mother (SPS mare by Warkant). I bred her the following year to a stallion related to WW's sire because I had really liked WW and thought it was a good cross. That resulting offspring will be 10 this year and is coming out at Grand Prix - so there is definitely some good dressage ability in there.
I have seen him a number of times over the years and also spoken with his owner. He seems to have a good temperament and his amateur owner was out showing him with no problems. He had a good start with Felicitas Von Neumann-Cosel and then his owner took over the ride. He has a very expressive front end and IIRC she said he was passing it on.