
If you don’t want to show full content in your Feedburner feeds emails and want to add a Read More >> links simply follow the given below steps and your are done.
1.Log in to your Feedburner Account
2.Choose your Feedburner FEED TITLE, Now go to Optimize >> Summary Burner >> Now add numbers of words which you want to show in Feedburner emails. Like I add 200 words and add Read More >> in “Maximum Length” text field save your settings.

3.Finally you are done.

It's not a great solution because the "read more" button is not a link so users aren't clicking on to the site.
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Thanks for the comment.
Thank you.
after reaching 200 comments my comment is not loading more. please help
Maybe you need to switch the comment system into IntenseDebate or Disqus.
Thanks…
This is all I want..
Finally I found this great tutorial…
I will apply this in my Blog.