I move my thesis project between Mac OS X and Windows a lot... and those HFS+ meta files get really heavy. Here's a little tip on how to lighten your load using DOS command line tools. From the base directory, type:
del /AH /S *
Don't be scared of the *, the /AH says only delete files with the hidden attribute on - all the HFS+ meta data files will have the hidden attribute on when transfered to NTFS using a tar-ball or a zip file (tar-ball for sure).
This is easily done on *nixes also:
find . -name .svn -exec rm {} \;
HFS+ Meta Files a pain for tourists...
