write(), print(), and println() now return number of bytes written.

The type is long, and negative values indicate errors.  Needs more testing.
http://code.google.com/p/arduino/issues/detail?id=551

LiquidCrystal.cpp

@@ -258,8 +258,9 @@ inline void LiquidCrystal::command(uint8_t value) {
   send(value, LOW);
 }
 
-inline void LiquidCrystal::write(uint8_t value) {
+inline long LiquidCrystal::write(uint8_t value) {
   send(value, HIGH);
+  return 1; // assume sucess
 }
 
 /************ low level data pushing commands **********/