Ditto.
Allowing passthrough IP's for Paypal and Paypalobjects in the portal is a must but I'd always be a bit edgy about hardcoded IP's. I'm still clueing up on how MW works and why it can't use DNS to get an IP or whole domain to pass.
After that you've got to script a voucher handout or not based on a PayPal response. I've been looking at this for a few weeks and am suprised to find only scant evidence that anyone does online vouchers at all.
I think the shop fronts in my host spot footprint would prefer physical voucher rolls for them to retail. So what I'm looking at now is a voucher printing system from the exported CSV files, preferablebly spat out by the shop's recipt printer??
I found this thread from 2007 about a voucher printing project but it didn't look to produce anything.
http://m0n0.ch/wall/list/showmsg.php?id=335/12MM