Hi, I've just posted version 1.0.2 of format.r to rebol.org. http://www.rebol.org/utility/format.r It includes one bug fix and a couple of added features: 1. Option to insert commas in long numbers. >> format 1e9 #..8 == "1,000,000,000" 2. Money values now formatted to various precisions: >> format $20 / 3 #.4 == "$6.6667" 3. No longer chokes on values like set-word! and path! . Have fun, Eric