Suppose someone created a service that sold downloads for bitcoins.  A typical service might charge $100 for 200GB or $0.50 / GB.  This would translate into 0.08BTC/GB or 0.00008/MB. 

So a service wishing to sell a 1MB download is currently priced out by transaction fees which my client tells me is still 0.01BTC or $0.06. 

Clearly the goal is to prevent "flooding" the network.  So what would happen if a pool operator accepted micro-payments with a much smaller transaction fee, say something on the order of the cost of the bandwidth for the transaction.  Say something like 0.0000001 per transaction?  Would the rest of the community still accept the blocks generated with this lower fee?

Currently I cannot send anything less than ($1) 0.149BTC without the client adding a 0.01-0.02 BTC (7%) transaction fee. 

I guess the mac version is still a 3.21 beta.  Has the threshold for charging the fees changed?