I saw somewhere that putting 'Domain For Sale' in the whois registration info of the domain is a good ideal has anyone done this and where is best to place 'Domain For Sale' within the info? thanks
Well, domaintools shows a link to the domain sale or auction if the domain is registered for sale in a number of places.
They do that only if they really intend to sell the name. Otherwise, it's not a good idea to use if your intent is to "hide". Those who are selling it can easily change the details if prompted.