When Tiger came out, I wrote that I wanted RSS feeds in the OS X Address Book:
Lots of my friends and contacts use sites sites like Flickr, Del.icio.us or LiveJournal. They have blogs, Amazon wishlists, and Upcoming pages. All this is possible to enter in the Addressbook app in Mac OS X 10.4. As of this version (or was it 10.3?), you can assign as many webpages to a user as you like.
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Now, checking all my friends and contacts blogs, new pictures, fresh bookmarks etc. takes time. And what better are computers for, than doing the boring stuff that you don’t want to do yourself? What I would like is to add a RSS button to all of these links.

Today HardMac has posted lots of screenshots from the coming 10.5 Leopard. On page 4 you can read this:
Leopard integrates a RSS engine which can be utilised by every application (dedicated API). Thus mail has also become an RSS reader.
This is interesting. What is stopping Apple from adding RSS inside the Address Book too? Have a look at it and tell me what you think. I would love to have this functionality. Since I wrote the original article it seems like everyone has got a blog, a Flickr account, a photocast, podcast or videocast. Having all this info tied to persons makes sense to me. If Apple doesn’t make this, maybe someone else could make it? As a plugin for the Address Book?