Opinions? I gots ’em! Me on Techradar:

The problem is that far too many online services haven’t a clue how they’re going to make money, and in many cases the business plan appears to be a single sentence: “Get bought by Google”.

Twitter arguably falls into that category, because it’s yet to find a way of generating significant income. That’s not a big problem if, like Twitter, the sites are doing something new, but if they’re competing against existing businesses then it’s bad news for the wider economy.