HM registries. I know a lot of people think they are tacky/ inappropriate. The one we looked into is with the Grand Hyatt in Kauai and it's NOT for gift cards/ money. You register for moonlight couples massage, dinner at one of the restaurants, excursions etc. I don't know if I should have my BMs include it on my shower invites.
We also have small registries at BB&B, Macys, and C&B.