i just tried this nice feature ...

it seems to runs correctly but when i do a preview of my feeds i've got this ...
Code:
This feed supports content:encoded. Your imported feeds may appear nicer if you use {feed:content:encoded} in your bodytemplate instead of {feed:description} and enable the Convert HTML to BB Code option.
also i've a question: when it create the thread with the feed it puts ALL the text of my 'new entry' so my question is: can i decrease the number of the words of my entries, so the feed only create a preview?