We went to this just a few months ago. DH36 is a HUGE ESPN watcher and sports fan so it was right up his alley. We got to watch a live broadcast of "NFL Live" from right in front of the Mickey Sorcerer Hat. Pretty cool! We did the NFL show in the theater (can't remember what it was called right now). Had the guys from "NFL Live" interviewing five current NFL players. DH is a St. Louis Rams fan and we got to see Steven Jackson so he was happy.
There are lots of events going on all weekend. You have to pick and choose which events you wish to attend and which athletes you'd like to see as some events go on simultaneously. Events are popular too so you'll have to get in line early in order to guarantee you'll get in. They broadcast a bunch of shows directly from DHS all weekend.
There are special parades which feature the athletes too. I don't really think there were meet and greet, autograph sessions. At least, we didn't go to any.
A whole back area near the RnR Coaster was set up for the interactive playground which had golf, basketball, football, baseball, soccer, etc. for you to participate in different things. Golf was longest drive, baseball was pitching and hitting. There was also several ESPN radio broadcasts going on from back there too.
We were hoping to get to the Mike & Mike in the Morning livecast but didn't get tickets for that show.
DH says he would definitely go again!