Well the market is doing a good job there is a company laying fibre through the sewage system. In my opinion private enterprise will easily be able to pay for because it is a product in demand. The trick to surviving in a bad economy is to be small and agile and provide a no frills low cost product. Which means isp's such as BT, Virgin, AOL should lose some custom to the competition who take pride in the fact all they sell you is the internet. Thank god we have LLU or this would not be the case.
Also high finance is based on real value. While we find the real value of property is not what it was priced at, in this "information age" this kind of infrastructure should hold its value, making it a worthwhile investment.