I mean someone with an emachine and a 2Ghz CPU with no external video card or maybe some $30 NVIDIA video card that does 10Mhash/sec.
All these competition for mining just has ruined mining for everyone. Let the people using freshly mined coins do them at a 50% loss of electricity. This way it'll just be kids who have trouble getting money into bitcoin to begin with.
Well competition is part of the game, the fact that nvidia cards aren't suited for mining is nothing anybody can do about. Mining is not about distributing the currency it is about innovation.
Innovating takes risk and this risk has to be rewarded, this is the only way bitcoin is gonna grow. And in order for it to be successful difficulty has to remain at the cutting edge as much as possible in order to provide the most security.
And something other to think about: The "bitcoin billionaires" will be not the freak miners. They will be the pioneers who either were the first to use a particular computing technology or, even more the ones who innovate in adapting bitcoin as a use as a actual currency. Merchants, producers of real world goods and service providers who are the first in the crowd will most likely get the largest part of the slice in the long run.
Who you gonna be?
Choose wisely