There seem to be loads of different possible routes for buying bitcoin for cash.
My Bank --> Visa Debit Card --> Paypal --> ExchangeZone --> LibertyReserve --> MtGox ......as one example.
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Umm, at the risk of sounding like a dick - where is this cash you are talking about?
Your bank, well that's not cash - it's numbers on a screen unless you go to an ATM, Debit card? not cash - same as above. Paypal is the anti-cash - the opposite of all the good that cash is. exchange zone? - a trade forum that knows what cash is. They don't want PP anti-cash either. LR - well that's final like cash. Bitcoin is also final in that there is no reversing mechanism - refunds are only by mutual agreement.
This is cash;
http://www.nanaimo-gold.com/define_cash.phpSome years ago the infamous JP May published his May scale of money hardness;
http://webcache.googleusercontent.com/search?q=cache:Kn84W9-C1lwJ:interestingsoftware.com/mayscale.html+%22may+scale%22+money+hardness&cd=1&hl=en&ct=clnk&gl=ca(note link is to google cache and may be temporary)
Now, I don't agree with some of the fine points and it does need some updating but the concept is illustrative.
Money with strings attached is not money at all - it's a promise to settle. Cash is a final settlement.
Unfortunately there is no cash slot on the computer.
Some, hopefully most, anonymous strangers' promises to settle are good, but there are those who's promises are no good.
The more liquid the trade item is, the more attractive to thieves. What is more liquid than e-currency?
People expect exchangers to work on tiny commissions and then complain when they won't risk accepting Paypal.
You want a solution? Take cash to Western Union or MoneyGram. Once the girl at the counter takes it, you have paid - a final settlement. No turning back.
Many exchangers also accept bank wires as they are final within a few days. Cheques clear in less than a week. Money orders or cash sent by mail are often faster.
What is slow is Paypal which can be stopped and reversed up to 45 days from spend. That's not cash. That's a promise only. American Express can be charged back 180 days after the spend!
You can't expect that a trader could keep trading his hard e-currency for strangers' promises. He would get robbed out of business unless he pried into his customer's lives, got to know them and charged them a hefty fee for the effort spent, and to cover the risk of when he was wrong about them. This causes delays and frustrates the people who are refused. This solution has the distasteful side effect of scammers posing as exchangers and doing ID theft.
So, soft money is harmful to privacy and invites fraud. Paypal has it's uses, but not for trading liquid intangible (or tangible) assets. Just for the same reason you can't fund a stock trading account with Paypal or a credit card, you can't buy internet money with Paypal or CC.
Those are the core issues we are trying to address with this Bitcoin project! Privacy and fraud.
I anticipate the next question - Where are the exchangers? The short answer; NOT in the USA.
All the US based exchangers were driven out or underground by the laws against on-line gambling. So ya all xenophobics might have to face that fear. ;-) The obvious place to look is Canada because of the common language and closely integrated banking and postal systems. New Zealand law is kinder to exchangers and there are some asian outfits as well. There are exchangers in England and in some of the former soviet republics.
Also understand that a LR dollar is not a US dollar. It is a separate currency, privately issued. It is value pegged to the USD but is not the same thing. You cannot put a LR dollar into a bank account and you can't put a USD into your LR account. You can trade a USD (or anything traded) for a LR dollar through a trading partner.