Morpheus. Would you be willing to do the trade with a prepaid credit card reload pack instead of cash in the mail?
Yes, I'll take a prepaid credit card reload pack. Though, I'm limited on how much I can trade for now. If prepaid credit cards become a popular way to fund Mt. Gox, I'll have to get a proper merchant account. Anyone interested can PM me for details.
Also, I'm willing to accept the following currencies via the mail: USD, Canadian Dollar, Mexican Peso, Euro, British Pound Sterling, and Australian Dollar (maybe more). However, I plan to exchange the cash (other than USD) at a local exchanger which may cost as much as a 10% loss over the spot prices. I'll not charge any extra for exchanging currencies over the best exchange rate I can get. I encourage you to find the best exchange rate to USD.
I can also send the above currencies using the same exchanger, but sending outside the US costs more. PM me for details if you're interested.
I'm working on accepting bank wires.
Finally, if you want to trade directly for bitcoin instead of Mt. Gox USD, I'll give it to you for 5% over/under the ask/bid price on Mt. Gox. This is just for convenience. I encourage you to buy Mt. Gox USD instead.