Students of conspiracy theory should dig around a bit on the curious writings of his primary accuser. Assange's very competent British defense counsel would absolutely destroy this woman in an adversarial court, but he may not get that opportunity if he's extradited to Sweden.
The interesting questions revolve the extent to which Assange's prosecution is being underwritten or otherwise pressured by governments Assange has embarrassed, principally our own. I believe that to be the case on zero evidence, but only because I trust the government less than I trust Assange, who has never lied to me.
At any rate, you can bet the powers that be aren't discussing this by diplomatic cable.