With regard to fetching has any thought been given on options such 
as: make refetch or make forcefetch. The former to continue an 
interupted download and the latter to wipe any corrupted downloads 
and start again. I know these things can be done by hand but support 
in the make files might be more user friendly. Maybe it is possible 
for the fetch routines to automatically continue an interupted 
download by checking the size of the file retrieved, and 
automatically replace corrupted downloads ?

--Sean