Or http://thefeature.net. - formerly Givemesomethingtoread. This is Marco's, or is associated with him somehow. It has great stories, and they tend to be the right length for the evening situation where lights are out, but I want to read before I sleep.

Another: http://www.aldaily.com/

You might also like the Fiddler in the Subway, a collection of articles by Gene Weingarten

You might also like TheBrowser.com which is a collection of great reads sorted by topics.

Oddly enough it reminds me of the better articles in Vanity Fair. Sadly, they're still mostly offline, but their less fluffy serious and political pieces are well worth it.