How am I just now hearing about Kottke's Stellar project? An aggregate for favorited items on Twitter, Flickr, Vimeo and YouTube from loads of people I know and admire? Uh, yes please. I realize that Tumblr has some similar functionality to importing these kinds of feed but Stellar makes the barrier for entry 100x lower (no finding RSS feed links, etc) and immediately starts serving you quality content. If you're not curious enough to sign up yet, do yourself a favor and have a peek at the Interesting Feed; from that point on it's a no brainer. You want this as a daily bookmark.