Don't know if there are any tennis fans here but I felt during the Federer era Henin has been extremely underrated. She has been just as dominant in women's tennis (although that might be different if the Williams weren't either always uninterested or always injured.)
I guess it's always good to go out on top but it's too bad that whoever becomes #1 next will basically get it because #1 retired. It should be an interesting year though since Sharapova and Ivanovic are so close in the rankings (62 points) that they could go back and forth all year long, which would be new in women's and men's tennis. I mean Federer/Nadal is fun to watch but it's one sided.
I guess I always saw her as great, but not all time because of the Williams sisters. It's like those two are taking the Agassi break, but never coming back from it as he did a few times.
She was a special player though and it's a shame. I see Federer on the downfall though too. it always happens quickly in tennis, though the best can of course pop up and still win a title here and there. But I don't think he's going to be as dominant going forward. The signs of breaking down are there.