I would like to use such a service, but I don't think any of them are popular enough. There was at least one other site that already does this; does anyone reme

I would like to use such a service, but I don't think any of them are popular enough. There was at least one other site that already does this; does anyone remember the name? Edit: Never mind; it looks like there are quite a few others, but again none of them are popular.