In my post 10 Tips to Improve Your Blog and Website, I suggested to have a summery of your post and the rest to appear after user click on it. This will be very useful in search ranking by search engines such as Google, but will annoy many users. Especially while I am using Google Reader or Thunderbird to read my blog, I found it much easier to have the full post. So I changed my blog to show the full post favoring to be user friendly than to be search engine friendly which is logical in my sense.