depends what's considered famous? my brother edited all of the back to the future movies. i've had friends that played pro basketball, and met quite a few players and coaches. road on team buses to and from the arenas, including the nba all star team bus.
i know a few local radio and tv personalities.
Being in the hospitality industry you tend to meet a fair number of famous people. Mostly business or media (singer/songwriter/producer/film etc.). Outside of the work enviroment I once met and shared a short limo ride with Ozzy and Sharon Osbourne in London after he played at the Town & Country Club ( 1987 I think)
I've met quite a few celebrities actually. I met Robert Englund (Freddy Krueger) at a book signing when I was about 8 years old.
I met Pierce Brosnan when I worked IT for the BMW plant in South Carolina (he was there for a party after one of his James Bond movies).
I sat across from Robert Goulet on an airplane a couple years before he died (RIP). Really nice guy, with great taste in vodka (he bought me a drink).
I also sat across from Al Franken and his blueberry of a spoiled brat son on an airplane about 9 years ago. Al Franken is an effing prick. Unfortunately his son will grow up to be just like him.
I met Don Rickles briefly after a show in Las Vegas in the late 90's. Very personable guy, and a true character.
I saw Nicholas Cage at a grocery store in New Orleans, but I didn't bother him other than to say hello.
I used to live 2 streets down from Angelina Jolie, and Brad Pitt in the New Orleans French Market (though I never actually saw them there once in the 2.5 years I lived there, and I walked down their street to my favorite restaurant almost every day).
I wouldn't actually call her a celebrity, but I shared a skybox with Clint Black's wife at a football game in Houston. (Back in the days of the Astrodome).
I think that about does it.
edit: I met, and raced against, Mark Martin at a Dave & Busters in Atlanta. He was there checking out a new 8 person Nascar game as a publicity stunt. I didn't beat him, but a 12 year old kid sitting next to me did.
I met Linford Christie in my gym... he looked even bigger in real life than on TV. Also met Peter Andre in a Mayfair hotel, didn't try to talk to him though, he had quite a few ladies around him posing for pics.
I worked at NBC for 24 years and met my share of stars. I was very good friends with legendary NBC announcers Bob Teague.and Howard Reig, both class acts. While most stars where friendly, my pick for the biggest piece of crap had to be OJ Simpson. He was rude and totally obnoxious while there. Comedian Bill Murray was another difficult person to deal with. Tito Puente's daughter Audrey, now a New York Meteorologist was sweet as candy. Favorite moment was when I put my daughter in Duane "The Rock" Johnson's make up room and he showed up and surprised her before appearing on Conan O'brien. She was totally blown away. My division was phased out 2 years ago and I no longer work there.
have met and talked to snoop dog in OKC when i was working at the ford center as security when i was 18 years old he was pretty cool and also met the guys from the RHCPs they were great. Also have met all the guys from Seether and Rise against after a concert where the signed my hat and a shirt and i got to shake there hands pretty cool stuff.
I've had lunch with Harry Connick Jr., was in a jam session with Maynard Ferguson, and I don't know if this counts or not, but I have a cousin who has starred in PSA videos for Lifeway, and has starred in 2 or 3 music videos for rising country artists.