diff --git a/README b/README
index 57155f6..0adc735 100644
--- a/README
+++ b/README
@@ -41,7 +41,6 @@ gobyexample.com signups
 = topics
 * web app
   * serve static files
-* string formatting
 * mongo
 * worker pool
 * rate limiting
diff --git a/src/xx-string-formatting.go b/src/xx-string-formatting.go
new file mode 100644
index 0000000..5b06362
--- /dev/null
+++ b/src/xx-string-formatting.go
@@ -0,0 +1,51 @@
+package main
+
+import "fmt"
+
+type Point struct {
+	x, y int
+}
+
+func main() {
+	point := Point{1, 2}
+	
+	fmt.Printf("default: %v\n", point)
+	fmt.Printf("default w/ vals: %+v\n", point)
+	fmt.Printf("go: %#v\n", point)
+	fmt.Printf("go type: %T\n", point)
+
+	fmt.Printf("boolean: %t\n", true)
+}
+
+// == todo
+// moar
+
+// Integer:
+// 
+// %b	base 2
+// %c	the character represented by the corresponding Unicode code point
+// %d	base 10
+// %o	base 8
+// %q	a single-quoted character literal safely escaped with Go syntax.
+// %x	base 16, with lower-case letters for a-f
+// %X	base 16, with upper-case letters for A-F
+// %U	Unicode format: U+1234; same as "U+%04X"
+// Floating-point and complex constituents:
+// 
+// %b	decimalless scientific notation with exponent a power of two,
+// 	in the manner of strconv.FormatFloat with the 'b' format,
+// 	e.g. -123456p-78
+// %e	scientific notation, e.g. -1234.456e+78
+// %E	scientific notation, e.g. -1234.456E+78
+// %f	decimal point but no exponent, e.g. 123.456
+// %g	whichever of %e or %f produces more compact output
+// %G	whichever of %E or %f produces more compact output
+// String and slice of bytes:
+// 
+// %s	the uninterpreted bytes of the string or slice
+// %q	a double-quoted string safely escaped with Go syntax
+// %x	base 16, lower-case, two characters per byte
+// %X	base 16, upper-case, two characters per byte
+// Pointer:
+// 
+// %p	base 16 notation, with leading 0x