Is there a “meta” bridal wedding registry site to list gifts at arbitrary websites?”
When I was reading your question I couldn’t help thinking what a great idea for a website. Maybe you (or a friend) could set something up. Most ISPs have free webspace available. Basically you would list links, pictures, widgets, etc. Then, if someone buys something from your list they could email someone else (unless you want to know who got what before hand) and they could remove it from the site. Wow, I might take this idea and check it out in more detail. Good luck and congrats on the wedding.