would this go well with either an orange or lemon curd?

I'd save the curd for something else. In my case, I'd eat it from the jar all by myself. :-)

With this cake, I'd prefer something a little less acidic than citrus, like a pureed pear sauce. Or the heated-up strawberries (or raspberries) the author mentions.

Definitely yes to both! I think lemon curd especially with the tanginess of the citrus. Any fruit would pair well with this cake.

I think either would go well because of the bright acid notes in the fruit against the meaty rich background of nut/coconut. Consider also - if you like them - raspberry or tropical fruit garnishes.

Omg...what curd wouldn't it go well with?! While I'm partial to a classic lemon curd....I think this would go really nicely with a passion fruit curd, if that suits your fancy.