I told Trafton and company about this because I'm working on-site at WPEngine this week and this looked very relevant to their interests. They specifically want to rescue your site (gratis) so that they can use it as an example of "Wordpress hosting is hard to do right. You don't want it to blow up on launch day. We're very experienced with not blowing up on launch day."

i.e. He doesn't want to sell you on WPEngine, he wants to save your bacon and use the bacon-saving to sell other people on WPEngine ;)

Jason Cohen (their CEO) says "We'd handle the migration immediately and give him a year of free hosting to get a case study out of this."

You should add to your marketing more info about how you are good in handling traffic and most importantly why. In a way that will make sense with both tech and non tech types. (Non tech has no idea what aws is or a cdn is for example). I've looked at your site a few times (even right now) and that isn't the thing that stuck in my mind from your marketing. The takeaway for me was "expert at WP" not necessarily "expert handling of traffic and here's why". I'm not saying it's not mentioned. I just think that point has to be driven home better.

I just grep'd the log and saw that in the three hours since I posted the screen grab there were 1610 unique IP's. So obviously many more people were not able to reach the site.