Recently, a few days before my friend’s wedding, I decided it was time to pick out a gift from their online registry. When I got there, the only things left were a blender attachment, a bath mat and one lonely coffee mug. From three different stores.

At that point, I just wanted to forget the registry and give them a (heartfelt) cash gift.

So, I’m curious, what do you guys think about a cash registry? The site Tendr lets couples register for cash in a surprisingly sweet and personal way: Couples can write a note, and guests send money along with a pretty e-card. As a wedding guest, I’d be psyched to do this instead of going through the rigamarole of a household registry (shipping, addresses, etc.). And isn’t money what most newlyweds secretly want anyway?

In some cultures, cash is already the go-to wedding gift. For example, my Indian-American friend told me that couples sometimes write “no boxed gifts, please” on their invitations, which, she joked, basically translates to “give us money.” Fascinatingly, she also said people in her culture often prefer giving uneven cash gift amounts — say, $51, $101 or $201 — for good luck.

What do you think? I’m into it.

P.S. Honeymoon registries, house registries and even restaurant registries.