Maybe everyone should compress the 1st 100MB worth of digits of pi, for an apples-to-apples comparison?
Edit: oh wait that's too easy. Need to generate /publish random digits so everyone can use it.
Compressor: Output an empty file.
Decompressor: Take any old algorithm for finding digets of pi, find first 100M of them, print them.
Compression ratio of 0! :0
random digits aren't compressible though?