Well definitely not Tebow that is for sure.
Probably Lebron James. Especially since it is NBA playoffs. NBA is all over ESPN and Sports Center right now. He has improved his game vastly this year and just recieved MVP and is probably the most complete player in the NBA right now. He still needs to improve his shooting ability, but he has been working on it. I don't really care for Lebron but if he continues to improve he will reach status near Kobe and Michael Jordan.
Although in the last few hours I'd say Carmello Anthony would be the most talked about since the Knicks just got knocked out of the playoffs. Kind of sucks Mello doesn't have a team that is capable of pushing forward seeing as he is probably the most dominant offensive threat in the game. He just needs another efficient scorer on the team. Obviosly J.R. Smith proved to not be the guy. Amare Stoudemire is also doubtful since he plays Powerforward like Mello. They need to get him a good scoring guard.