They are essentially the same except the relative imports are changed to 
use . syntax, simplejson._speedups is changed to _json, simplejson is 
changed to json, .format strings are used, and the test suite changes 
slightly. I can add fixing that struct function and removing the #if stuff 
from the C code to that list as well.

The way I see it, the names have to change anyway, so other things might 
as well be modernized as long as it's trivial. I personally didn't make 
the call to switch from % to .format, someone else did that after I had 
originally committed simplejson to Python 2.6 trunk.