Hurm.. I've met a few.
As for the ken griffey Jr. thing.. Up in MN here my friends dad had seasons tix through his company to the Twins games. I was a die-hard griffey fan (I have just about every damn card of him until about 95 or so), so I talked my friend into getting his dad to let us go to a mariners game when they came into town. These tickets were great, right by second base (visitors dugout). We got there early, and the mariners were just starting to get out on the field to warm up. Griffey was there, and I/my friend were wearing gloves and standing there looking star-struck no doubt, and he tossed a couple back/forth with us.
I was about 13 or 14 at the time.. made my fricken month at least.
Also the Vikings up here that live in MN all live in a pretty close radius in this super-rich city. Actually right near their training camp (winter park). So I've seen many, many vikes players coe into a video rental store my friend worked at that I just hung out a few nights. Met gary anderson (highest scorer in the NFL), chris carter, and daunte culpepper I believe. And yes, I did have access to their phone numbers/addresses from the rental computer. Also met/talked with John Randle at a gas station I worked at for a few months, go figure.
Met the governor of MN (not jesse, older one) when I was on some jnr. politician trip thing. Also worked closely with a MN senator trying to get a hate crimes bill passed (testified to the senate, etc.)
For you rabid kentucky college B-ball fans, I've met the U of L head coach on a number of occasions. Donut know his name, and didn't really care..
*shrug* not too many. but a few...
-Phil