compressed content and output buffering

Hi The way output buffering and output compression work, all the output is buffered until script termination, at which point it's compressed and then all sent to the browser. Is there any way having it compressed but not buffering it? gzip is a stream based algorithm, so there shouldn't be any problem theoretically. I imagine mod_gzip would help in this respect - but I'd like it to be switched on and off within PHP. Anyone know a nice way of doing this? Thanks -- Shane