This was the main reason many signed up for paypal, to order items online because they either had no credit card or sought an alternative. Is this (legally) possible? If so what is holding them back from implementing such a service? It would wipe out the need for spendbitcoins.com and alike businesses.
You could either spend from BTC balance or USD balance. If Mtgox already offers usd vouchers I don't see much difference in a virtual debit card.
This would also alleviate some of the demand for BTC -> paypal trades as it leaves fewer reasons to use a paypal account if you've got a gox/th.
Here is a link to a VCC service if you are unfamiliar. http://www.vcc-shops.com/