MarketPress Gift Vouchers

Is it possible to sell virtual gift certificates through MarketPress? The user should be able to buy the GC, receive a code via email, then use that code to purchase, deducting the value from the code each time. I had a plugin like this developed for WP E-Commerce a while ago and it was a total mess. Would be great to see it here, I might just recommend migrating my client over if so.