Mandy Brown, writer of the excellent A Working Library weblog, lays out the principles for designing good reading experiences online in a new piece for A List Apart:

Despite the ubiquity of reading on the web, readers remain a neglected audience. Much of our talk about web design revolves around a sense of movement: users are thought to be finding, searching, skimming, looking. We measure how frequently they click but not how long they stay on the page. We concern ourselves with their travel and participation—how they move from page to page, who they talk to when they get there—but forget the needs of those whose purpose is to be still. Readers flourish when they have space—some distance from the hubbub of the crowds—and as web designers, there is yet much we can do to help them carve out that space.

I’ve read and admired A List Apart for years, and this is easily one of the best pieces they’ve published to date. Required reading.