More wrestlers have written about their Killer Kowalski memories on WWE.com:

Triple H:
"He wouldn't go down for the three count; his body kept going and going," The Game reflected. "It's a huge loss. Walter was one of the biggest name performers of his time. His legacy will live on forever."

Kenny Dykstra:
"He was the biggest villain in the ring, and the sweetest guy outside the ring. He'd give the shirt off his back to you," Dykstra stated. "Every single day he would beat the crap out of me. At times I was like, this is ridiculous. This old guy is whipping my butt. But, once I got into the WWE, I realized everything he showed me worked."

Jim Ross' blog at JRSBARBQ.com has a long piece from Cowboy Bill Watts also.