You mean like a filehandle or a scalar? I'd like to be able to open a data file with $root->{tmp}->{data.txt}.

The idea of just reading and writing a file by assigning to a hash is very tempting, although getting a filehandle back might be better if it has to be passed to other functions.

If you add either, I could see myself using it heavily, not the least because it would allow me to transparently fake a filesystem. VFS perl style. Woo hoo!