I read the Wiki HFS Plus is supported but the router something else. I'm confused. Someone can explain to me why not anymore?
http://www.dd-wrt.com/wiki/index.php/USB
File System:
hfs.o (Apple HFS file system support) hfsplus.o (Apple HFS+ (Extended HFS) file system support) nfs.o (NFS file system support w/ NFSv3 client support) nfsd.o (NFS server support w/ NFSv3 client support) ntfs.o (NTFS file system support w/ NTFS write support)
Below, screenshot of what I see on my router.
Just added hfs to automounter yesterday:
http://svn.dd-wrt.com/changeset/23413
will be included in upcoming build.