IM Worms causing headaches for corporate companies

IM Worms are on the rise, causing major headaches for many corporate companies.  Once these new worms get inside a corporate network they can cause havoc, making the old e-mail attack viruses seem like peanuts in comparison. 

Systems such as MSN, Yahoo Messenger, and other 'chat' programs are the main target of the IM worms, but corporations should still be concerned.