Via the Library of Congress blog, it looks like the LOC Website will be getting an upgrade in the coming weeks. They make a good point about choosing between providing RSS feeds and email updates, noting that many more people use email than RSS:

While only a fraction of people on the Web use RSS feeds, something like 100 percent of them use email, and this is just another part of our efforts to get information to people in the way that is most useful to them. You can get a sense for how the email updates will function by looking at the FBI’s Web site.

Happily, they’re not choosing between the two, and have a pretty broad set of RSS feeds already on offer on their RSS page.