i had a simular problem, everything except my speedometer and blinkers went out. i checked the gauges fuse and it looked good, decided to try and switch it out anyway with the radio fuse (damn thing doesnt work anyways!) and bam tach, fuel gauge and everything came back on.
the next morning on my way to work the speedo didnt work, (since i was just sitting still in the drive way i didnt notice it!) put a new fuse in the radio one and then it worked....so if you havent tryed that id replace those fuses just to see, i tore apart all kinds of stuff looking for a loose connection and it turned out to be something simple.
[This message has been edited by CC71 (edited 04-27-2008).]