I just enabled full text feeds on this blog so now you can subscribe to my feeds and read full articles from the comfort of your feed reader 🙂 .
I'm using the <!--more--> tag on some articles and because wordpress 2.1 also splits the feeds when it finds the more tag I had to install the Full Text Feeds plugin created by Ronald Heft.
There are some other methods to do this presented by Kevin Muldon on his How to use the more tag and display the full content in your RSS Feed post.