> Just out of curiosity, how do you test the compatibility? Running a
   > handful of programs is a good idea, but do you have any way to test its
   > actual compliance (e.g. if a create a web page, I could test it it a
   > handful of web browsers or I could use a validator to test its
   > conformance to a certain standard)? 
   
   I write simple tests to check for a particular system call or mach trap
   behavior. The programs are simple, about 20 lines of C each time, but
   they are extremely important, non only to check conformance, but also to
   debug the emulation code. 

it would be good to commit these to the source tree in src/regree some
where, i'm not sure how we'd use them automatically...perhaps checking
in uuencoded copies of the binaries would be necessary...