I agree that amplify seems to offer more abstraction.  But the Brace homepage says its more than just using significant whitespace:<p>"Brace has coroutines, hygenic macros, header generation, #! scripting and cached executables, libraries with graphics and sound, and many animated demos." (<a href="http://sam.nipl.net/brace/" rel="nofollow">http://sam.nipl.net/brace/</a>)