make it compile with arduino 1.0 ; function is still untested.

Marlin/Marlin.h

 // Licence: GPL
 #define  HardwareSerial_h // trick to disable the standard HWserial
 #include <math.h>
-#include <WProgram.h>
+#if ARDUINO >= 100
+  #include "Arduino.h"
+#else
+   #include "WProgram.h"
+#endif
+
 #include "fastio.h"
 #include <avr/pgmspace.h>
 #include "Configuration.h"

Marlin/MarlinSerial.cpp

 #include <string.h>
 #include <inttypes.h>
 #include <math.h>
-#include "wiring.h"
+#if ARDUINO >= 100
+  #include "Arduino.h"
+#else
+   #include "wiring.h"
+#endif
 #include "wiring_private.h"
 
 // this next line disables the entire HardwareSerial.cpp, 

Marlin/SdBaseFile.h

  * \brief SdBaseFile class
  */
 #include <avr/pgmspace.h>
-#if ARDUINO < 100
 #define  HardwareSerial_h // trick to disable the standard HWserial
+#if ARDUINO < 100
 #include <WProgram.h>
-#include "MarlinSerial.h"
 #else  // ARDUINO
 #include <Arduino.h>
 #endif  // ARDUINO
+#include "MarlinSerial.h"
 #include "SdFatConfig.h"
 #include "SdVolume.h"
 //------------------------------------------------------------------------------

Marlin/SdFatUtil.h

  * \brief Useful utility functions.
  */
 #include <avr/pgmspace.h>
-#if ARDUINO < 100
+
 #define  HardwareSerial_h // trick to disable the standard HWserial
+#if ARDUINO < 100
 #include <WProgram.h>
-#include "MarlinSerial.h"
 #else  // ARDUINO
 #include <Arduino.h>
 #endif  // ARDUINO
+#include "MarlinSerial.h"
 /** Store and print a string in flash memory.*/
 #define PgmPrint(x) SerialPrint_P(PSTR(x))
 /** Store and print a string in flash memory followed by a CR/LF.*/

Marlin/SdFile.cpp

  * \param[in] b the byte to be written.
  * Use writeError to check for errors.
  */
-void SdFile::write(uint8_t b) {
+#if ARDUINO >= 100
+  size_t SdFile::write(uint8_t b)
+#else
+  void SdFile::write(uint8_t b)
+#endif
+{
   SdBaseFile::write(&b, 1);
 }
 //------------------------------------------------------------------------------

Marlin/SdFile.h

  public:
   SdFile() {}
   SdFile(const char* name, uint8_t oflag);
-  void write(uint8_t b);
+  #if ARDUINO >= 100
+  size_t write(uint8_t b);
+#else
+   void write(uint8_t b);
+#endif
+  
   int16_t write(const void* buf, uint16_t nbyte);
   void write(const char* str);
   void write_P(PGM_P str);

Marlin/planner.h

 
     
 /////semi-private stuff
-#include <WProgram.h>
+#if ARDUINO >= 100
+  #include "Arduino.h"
+#else
+   #include "WProgram.h"
+#endif
 
 extern block_t block_buffer[BLOCK_BUFFER_SIZE];            // A ring buffer for motion instfructions
 extern volatile unsigned char block_buffer_head;           // Index of the next block to be pushed