Can't read my Windows (Boot Camp) partition from OS X
NTFS support was removed in Lion, follow below to re-add it (you should be able to write to the drive as well, after installation)
install and enable ntfs-3g: http://www.macupdate.com/app/mac/24481/ntfs-3g/
and install fuse_wait: https://github.com/bfleischer/fuse_wait