I was enjoying instapaper because it just works but then I checked out Readitlater which someone wrote a nice script in Calibre (if you have a ebook readder and are not using this, you should be) for. And I’m converted. Its not as casual but with things like the firefox plugin, its certainly a much richer experience and works how I tend to work. There API could also be very useful for my plans to do with semantic desktop logging or even to move things into a archive space like delicious.
