First of all I want to say something about how he got famous in the first place. WikiLeaks.
I don't understand the whole hype around this man. He has done nothing wrong as he didn't leak the documents himself. I personally see no need at all to read or post all these documents but doing it cannot be illegal in any democratic country. I'm quite surprised the display of 'power' the US is showing to every country to exchange Assange to the US, since in my believe, freedom of speech is held quite highly in that country.
Don't get me wrong, it wasn't smart to publish all the documents and he should have thought about the consequences for international relationships before he published it but stupidity or ignorance is not a crime.
Now to the point of the rape charge. I personally hold Sweden in high regard when it comes to justice and human rights. If not the highest. If he is innocent as he claims to be, I wouldn't fear going there on trial or being exchanged. In my opinion Sweden is one of the safest places for this man right now, IF he is innocent, which seeing how he doesn't want to go to the hearing about it, I very much doubt.
If he is guilty of the charges in Sweden he should be put to prison in Sweden and not be exchanged to the US, just because they want him as well. He committed no crimes in the US and he did commit a crime in Sweden. Let for once, justice prevail over politics...