I don't think Nadal has much to worry about come RG, herc darling. Stan will find it very hard to beat Nadal should they meet though Soderling has done it before, but still, it's the most difficult thing to do in thid era. Besides, there's the overwhelming factor of finally beating Nadal at RG. Even Nole couldn't overcome it last year but at the same time, anything is possible.
Nadal may have some issues going on and I am more sided with the confidence factor as you know. Anyway, don't worry too much and see how things pan out next few weeks.
Federer looked very happy today despite the loss. I believe he was very happy for Stan as well, his fellow country man and besides, they have become good friends over the years. Sure the loss sucks but still, I don't see any reason why he wouldn't be happy for Stan. I mean Roger wasn't going to give it to Stan either if you know what I mean.
Anyway, don't dwell on Nadal too much. He's too much of a pro to not take things seriously and I am sure the beatings at AO and Miami were crucial for him, so if anything, he should be the one who's in the real know.