This week's book giveaway is in the OCPJP forum. We're giving away four copies of OCA/OCP Java SE 7 Programmer I & II Study Guide and have Kathy Sierra & Bert Bates on-line! See this thread for details.
I don't think MessageFormat or Properties does that sophisticated of substitution. Usually one provides a place holder in a String and provide MessageFormat with both the String and the value for the place holder.