Another consideration: it looks like those of us without fb accounts probably can't even look at lists or buy for friends / family. This is a bummer on a personal level, but also limits usefulness in cases where anyone who would see the list doesn't use fb or feel comfortable using it to log in.

To the developer: please consider adding email-based login, or maybe just unique links sent by email for viewers without fb.

Since yesterday, it's possible to view the items in someone's list without logging in. If you open your own wishlist in incognito mode you can see how this looks like :)

I get why it’s easier from the developer perspective, but I don’t have a Facebook account and certainly won’t create one for any reason, let alone such a service. Hopefully the developers/owners of the service recognize this and allow more because not doing so eliminates potential customers.

I definitively recognize this, which is the reason for the "Why Facebook?"-explainer on the site. It alienates a lot of users, especially in the HN-crowd, and I'm hoping to do something with it at some point.