Unfortunately most viral's tend to cater to idiots, I can't see the people who are entertained by viral trends getting excited about the blockchain and cryptography.
To be honest viral might not be that great for Bitcoin anyway, how many viral's last over a year? Most last a few months before descent into oblivion. Also imagine a load of lemmings pouring into the Excahnge systems too lol, unencrypted passwords, lag and scams would quickly damage Bitcoins reputation. My point is not that these issues don't already exist, but viral does not leave much room for the user to get acquainted with the technology.
I would rather a slow gradual process where Bitcoin slowly becomes the norm, this would actually attract a lot less issues in regards to legal pressure I assume.
Yea, I don't think "Viral" is the appropriate word. Paypal didn't go "viral", but everyone enjoyed using them and eBay allowed for them to have a *reason* to use them until they grew so large that eBay had to buy them. I guess the real question is, when will something *important* use bitcoin. Donations are not important in my book, neither is *anything* the bitcoin community creates for other bitcoiners. Amazon using it (never happen, they have Amazon coins that make them a profit), eBay using it (never gonna happen, too many issues with user fraud), Apple using it (never gonna happen, they have iTunes credits they make a fortune off of and enjoy controlling) would all make bitcoin a success in terms of the average household holding bitcoins within a few years time.