Dave Winer has a simple, but very good idea.
"A very simple idea for improving
Google search and getting rid of spam problems all in one swoop, and it's not the first time the idea has appeared here. Let me tell you where my weblog is. Then it knows what my interests are. Give me search results relevant to who I am"
Extend that: And / or, let me tell you where my OPML / Blogroll is. Or my tagcloud, or my wishlist, or my book catalog, or my bookmarks.
Tags: OPML, Blogroll, Attention, opmlwishlist, wishlist, Web 2.0, Search, Tags