The Fpu library which supports using the uM-FPU V3.1 floating point coprocessor with Arduino, and the Fpu64 library which supports using the uM-FPU64 64-bit floating point coprocessor with Arduino, have both been updated to support Arduino 1.0. The Playground pages have also been updated.
http://arduino.cc/playground/Code/Fpu
http://arduino.cc/playground/Code/Fpu64
Cam Thompson
Micromega Corporation