Google Bookmarks (beta)
http://www.google.com/bookmarks/
I just started playing with it, so far it looks like a history of all my google searches. While your looking at the history you can click a star next to it to have it add that item as a bookmark.
Is this a del.icio.us killer? Dunno so far, then again i dont think it wasn met to be one (they dont even have RSS support)