Yes, classified information will continue to leak, as it always has.
But WikiLeaks, at least to my knowledge, is deeply wrapped up with Assange, and it is not clear (to me, at least) how it would function in his absence. In the words of this article (http://networkcultures.org/wpmu/geert/2010/08/30/ten-theses-...), WikiLeaks is essentially a "Single Person Organization".
Assange might take the fall, but the means nothing of the rest of the operation.
Wikileaks: It's not a wiki, and you can't leak anything through it
As for the content hosted by Wikileaks itself, thousands of mirrors and torrents of that have been going up since the fervor over the cables. I wouldn't worry too much about that. I think the real worry should be that Assange is about to get black-bagged.
Ideal would be the leak of documents describing the conspiracy to trump up charges against Assange after the relevant governments realized that he cannot be prosecuted under any existing speech or espionage laws.
I'm also curious to see at what point the key for Assange's insurance.aes is leaked.
They have absolutely thought this through, with all the necessary "insurance" they have been spreading around.
Regardless of the fate of one man - Assange - classified information will continue to leak.
The wheels are in motion.