Here's an autopsy of my foray into this domain - <a href="http://swapped.cc/certtime" rel="nofollow">http://swapped.cc/certtime</a><p>My takeaway is that this is a variation of an insurance business - you have to sell people on needing protection for times when sh#t hits the fan. It's an unpleasant topic and very few would ever want to concern themselves with it, at least voluntarily. So making something like VirtualNotary work is pretty much exclusively a sales and distribution problem. The technical side is easy.
Any plans to open-source the implementation (minus secret keys and other sensitive credentials, of course), so others can set up their own virtual notaries, to defend against a single point of failure?