I Ipoded my X5 using the cassette adapter (around 4$). The cable was removed, and instead, I welded the retractable cable of a mini-mouse in order to avoid the dangling cable, but keep the possibility of taking it of for searching (USB has 4 cables, hence the stereo is preserved)... now about the holder: it's an old Ipod cable connector that I cut, and i glued the cable cover from below to cover the remainder of the cable (after putting some paper inside, because the original cover is transparent). finally, how is the new holder attached to the air vent? well, i broke the holder of an air freshener, and super-glued it to the cable connector(holder) and I got myself a nice Ipod holder, and since the nano is sooo light, it holds really firm...
the sound quality turned out to be great!! Cristal clear, stereo, everything... with the DSP the result is magnificent... and the look is nice and neat (almost) and I can browse while leaving it as is, or take it of for better control then get it back without worrying about the cable, cause it is retractable....
what do you think??