Sounds Interesting, also because the damn bitcoins are open source. But I agree with BP (before poster), it is hard to regulate/implement a currency you can't handle.
I think the wallet.dat shouldn't be stored on your HDD, transfer it to your usb stick and just plug it in if you want to send or to recieve btc. Makes the whole thing more secure
interesting idea, although I don't think it is very useful to send an invoice (or debit like you pointed out). It could lead to unstable deals if you aren't going to pay the invoice.
Well, I am Omneybus. I want to buy some BTC through PayPal, signed up at Bitmarket.eu and verified me with ebay. Got no answer after nearly 3 days, little bit sad. Anyway, I also mined on my Alienware but after 2 Days I got like 0.00569 BTC...Not that much