Thanks for the responses, almost forgot I started this thread.
xxodaraP - I would like to fit something like this, but being a full DIN unit, there simply isnt the room to do it in the dash, and fitting it in the glovebox isnt really a possibility because I want to be able to see whats playing at a glance, and be able to change stations/tracks/sources from my seat, and I wouldnt be able to get to the glovebox without taking my eyes off the road for too long. Usually I dont have a passenger I could get to do it for me either

unless of course I could get a remote control, with basic display.
808Wagon - the half DIN size would be ideal, and probably posible to mount where the stock unit was or under the dash, but the lack of an FM tuner at least probably rules it out, about the only time I catch any news or weather is on my way to work in the mroning, so I kinda want to keep that if at all possible.
I did almost find what I wanted, was designed for marine use, had the main mech of the unit mounted remotely with CD player, USB, iPod etc. with a control unit/display which mounted on top of the dash. But the display was obviously intended to be surface mounted on top of the cab or whatever and so was ugly, and being a marine unit it only came in white.
googling mechless head unit seems to be the go.
I dunno if I mentioned it before, but I would have thought someone would have made a 1/4 DIN media player similar to what all the UHF CBs are these days, or even better something with a remote 1/4DIN control panel like this
http://www.uniden.com.au/australia/p_uh015sx_index.asp