Maybe not popular, but very useful. What else can be improved in M33 CF? (except UMD VIDEO support). No-umd mode is now 100% compatibile (m33 driver is almost as perfect as sony's one), so there is not much to do.
Wi-fi transfer is already integreted in firmware, it just has to be extented for audio, video and iso files. I have no ideea is that simple or not (but sounds rather simple), and I think that extending it wouldn't be much work for such briliant minds as M33.