I know there's much love for DNSimple, but this is the first time that I can remember when the top comment of an X is down post is a competitor essentially posting an advert with no insight on the OP.
I feel for the operational folks at Zerigo - dealing with this type of outage is hard. The best thing they can do at this point is get back on Twitter and talk to their customers - the last post was 4 hours ago - that's a lifetime when your system is critical.
How much computing power and attack traffic can those really handle?
If you are going to offer a solution to a massive DDoS I would think that you would be careful on when to propose your solution.
Instead of adding another unicast network to the mix, why wouldn't you start using an IP anycast network?
Please explain how much capacity you have.