While I post the occasional link to Room 26 Cabinet of Curiosities, I cannot urge you strongly enough to stick this link in your bookmarks, your Bloglines, your Google Reader, or just drop by every now and again. I promise you will not be disappointed.
It's the blog of the Beinecke Rare Book and Manuscript Library at Yale, and the posts highlight interesting documents and artifacts from their collection, and nearly every one is my new favorite.
However, it may take some doing to top The Book of Accidents: Designed for Young Children (1831). Imagine a 19th century Edward Gorey without a sense of irony - I've never laughed so hard.
Hats off to Tim Young and Nancy Kuhl, curators of the blog (among other things), whose finds consistently delight and amaze.