Thanks Scotty,
I played around with it and was successful in truncating the message.
However, since the RSS childnode that holds the content of the posting also contains a bunch of other information (author, posting date, lots of html coding, etc) I found it not to be as reliable as I would like.
For example, the truncating method considers all the html codes as part of the message, so the truncation could occur right in the middle of a html tag. This also makes it difficult to predict how many characters of the actual posting will get displayed, as the number of characters taken up by the html tags is always a variable. It is also problematic if there is an image or YouTube video inserted into the posting.
This means the content and format of the posting can affect the final result.....sometimes it works fine, other times it returns a server error.