I just spoke with CIRA about this today. According to them, the changes are being implemented to comply with PIPEDA, Canada's privacy legislation. The changes only apply to individuals, so if your company has registered the domains, they are not affected, as corporations have no privacy rights. Under the changes, the name and contact details of the domain owner will not be displayed when doing a whois lookup. However, there apparently will be some sort of channel of communication via CIRA so that you can forward a message to the domain owner. The changes are supposed to be implemented June 10.