Global contact adds for multiple network

Here's an idea: since you can grab contacts from profile APIs, why not create a service where you can connect to contacts already on those network as well?

For example, when I just added someone as a friend on FriendFeed, one of the things that I do almost immediately is to also add them on Twitter + Flickr, then eventually also on Facebook, LinkedIn, etc.. this process gets repeated so often that it's getting annoying.

Would be great if someone would implement something like this, and it seems to me that you guys would be the ideal candidate!