While reading Lifehacker today, I came across a post about Giftag.
Giftag is a free, web-based wishlist creation service that supports products all over the web. … Armed with a Firefox add-on, at any site you visit that uses the hProduct format, you can add the item with all the product details to your wishlist in one click.
The source of how Lifehacker found out about it, Read Write Web, had some more information about Giftag:
[Giftag] was created by Best Buy, a retailer that didn’t have an online registry service. Instead of creating one, though, they decided to create Giftag instead: a browser plugin that lets you make online wishlists and share them with your friends. The technology will be integrated into Best Buy’s web site in the coming months.
I had wishlists on a few sites (Amazon, Think Geek, etc.) but now I can consolidate everything into one list.