MacRumors found a hidden feature in one of the early developer builds of the next version of OSX, which has not yet been released. The new ability is called reading list, and here’s how Apple described it:
Reading List lets you collect webpages and links for you to read later. To add the current page to your Reading List, click Add Page. You can also Shift-click a link to quickly add it to the list. To hide and show Reading List, click the Reading List icon (eyeglasses) in the bookmarks bar.
It’s going to be part of Safari, and it’s clear from the description that this is intended as a competitor to Instapaper and ReaditLater. But it won’t be a serious competitor. Both Instapaper and ReaditLater support multiple bronsers on multiple OSes and that will give them a major advantage over Safari’s Reading List.
Speaking of Safari, iOS 4.3.3 is supposed to drop soon. If you download it, you might want to check to see if that version of Safari also has this feature.