We had the same issue with Authorize.net a while back as well. If you have your own merchant account and only need a gateway you might try www.USAepay.com. They have done a good job for us.

I would definately start looking to move your gateway if Paypal is going to take over. As we all know PayPal does whatever the hell they want whenever they feel like it! I would be nervous with PayPal taking over Verisign.