How ... convenient all of Wikileaks were damaging to the government of the USA and somehow never to the government of Russia. And, of course, Mr Assange had his show on RT (Russia Today). No way he is a Russian agent. No way.
No, he definitely wasn't/isn't a Russian agent. You'd have known because then he would have fled to the Russian embassy instead. Assange basically did what he could to damage the interests of the USA, and probably succeeded wildly beyond his dreams. He's made a whole bunch of stupid calls and he's blown his own credibility and that of WikiLeaks by showing an overt agenda instead of just being a 'dumb pipe'. Funny tho…
If Assange is a Russian asset, he is one that it is critical for Russia to conceal it's connection to if he is to continue to have value. Not running to Russia's embassy has helped him continue to spread propaganda that serves Russian interests, so it's not incompatible with him being an (even actively managed) Russian asset.