This sounds like a good feature

Makes your work a lot easier and members happier

Yes it does. We pay 2% fee though. We did another one today by the way. I think it works fine for us when there are 20 or more PayPal payments in queue. That means that our payments will average 48-72hours. I really don't want that for now. Of course its unavoidable as site grows + members get more money on their accounts (No Paypal fees for premier or business)
Next : AlertPay mass payments - 0 waiting payments today so i guess we have some time to study and modify the script to output the proper file for AlertPay mass payments.