1. This will probably be done in arc2c eventually. Shouldn't be too difficult either.
2. On Anarki the variable 'current-load-file* does this. However the current solution is not thread-safe and having two threads perform 'load at the same time will fail. This means that 'current-load-file* might be changed to a 'thread-local, meaning its contents will be accessed via '(current-load-file* ) - currently it's just 'current-load-file*
3. Someone has to modify infile to do this seamlessly.
