InstaPaper

Similar to a concept we were ptroposing to Bloomberg - tage pages you want to read later:
http://www.instapaper.com/

Instapaper gives you a Read Later bookmark.
When you find something you want to read, but you don't have time, click Read Later.
Come back when you have time, or read your articles on the go.

And here is an article from PC World on why it may be one of the first big iPad Apps.