I bookmark and tag (via delicious.com) a lot of stuff I need to read later but struggle to find time and access to those articles when I have a gap in my schedule (that magic 15 mins waiting for my daughter to get changed after swimming - which often seems twice as long)
The answer is Instapaper- It's simple
1. Mark something to 'read later' with a bookmarklet
2. On iPhone load (free) Instapaper application & update over your network
3. Read - you don't need to be online once your documents are synched.
It's wonderful and it works. I've loaded up some of the great articles from Zenhabits.net for me to chew over when next I have a gap to fill.
You can also access the Instapaper.com service from a web browser and on a web-enabled phone. The iPhone gets the advantage of offline reading on the iPhone.