Just found this on youtube, I believe it to be pretty rare (not very flattering though, lol):

I've uploaded some candid photos of Brock's autograph session at Gould Chevrolet from may 22nd to our gallery (scroll down to latest aditions). Enjoy! What's up with all the little kids crying at Brock's sight?! lol

Boxing trainer Peter Welch, who is helping Brock train for the Carwin fight, said only one sentence when asked how training w/Brock goes:

“Let’s just say that technically, he’s going to be a different fighter on July 3rd.”

[Credit: Heavy.com; Note: everyone who is part of Brock's camp signs agreements not to speak about what exactly they are working on]

From ESPN.co.uk:

Nogueira has cast his eye over the forthcoming heavyweight title showdown between champion Brock Lesnar and the unbeaten Shane Carwin. Big Nog predicts Carwin's sharper hands will prove decisive, although he insists Junior Dos Santos could beat both of them.

"I think Carwin is more aggressive, has better hands, is coming through a good phase in his career and I believe in his game," stated the Brazilian.

"But, for the future, I can see other athletes coming closer and I think this belt will end on Brazilian's hands, maybe Junior dos Santos and me trying to win this belt."

MMA/boxing trainer Trevor Wittman who is preparing Shane Carwin for his fight against Brock was interviewed on FightHype.com:

Q: Brock Lesnar is another tall order for you to tackle. He is not only a physical specimen, but we're seeing improvement every time out from him. How do you attack a guy like this?

TW: The thing is we just gotta be 100% that night. I'm really excited about this fight. We were supposed to fight Brock awhile back and then he had his situation where he had to take some time off. I'm really glad he's healthy and glad he's able to do what he loves, which is fight. I think Brock's a great fighter for only having the amount of experience that he has. Stylistically, I think this fight fits us a lot more than the Mir fight did. I was more nervous about the Mir fight than I am about the Brock fight. We were supposed to fight Brock and then, all of a sudden, we got Mir and I always thought Mir was the best heavyweight in the division. He has so many options, he's very light on his feet, he does very good boxing, he does really good kicks, he's very creative and his Jiu Jitsu is world-class. We had to come up with a really good game plan for that fight. The thing is I don't think anybody has seen all of Shane's striking and that's like a hidden weapon for him. We went in there and wasn't able to tune up because we had a year layoff at that point as well. I feel we have a few advantages coming into this fight and I'm really looking forward to it. Everybody in this game right now feels that Brock is unbeatable and I love that. It puts more on the table and puts less pressure on our shoulders and makes there be a lot to accomplish. We're winning a world title, but we're also beating someone that a lot of people think is unstoppable. That's the task at hand and any time you can have a task like that, it makes the challenge that much better. It's more entertaining for us.