Thank you! That was considerably more helpful than: most of my points are incorrect.
I get that 60i is recorded as two fields... the frames don't really matter (they're assembled in software anyway: 24, 25, 30...) that is still 2 fields that are slightly different in time, and not one whole image that progressive should be. Or do I not understand the concept of progressive? It should in no way have the claim of being progressive.
When I open my camera's 1080 clips in QT(7), the Info window shows 59.94 fps, so I guess media from my camera gets "flagged" incorrectly? This is what I'm used to. QT still "knows" to play it at 30.
There's a rather large gap between "should" and "what is" and quite a lot of us have struggled with the in between. I don't think it was until FCPX 10.0.3 that the media from my camera would import into FCPX without transcoding in another app first. I have been faced with that "black video" on import in FCPX and I was only trying to help with my personal experience of that situtaion. And while I'm thinking of it, if the OP is still tuned in... he should make sure he has upgraded to the latest version of FCPX. There have been significant improvements (again, based on my own experience) in its ability to handle more types (brand variations) of imported media.
As for audio, my clips (AAC) import just fine (without transcoding) and play without issue (with the accompanying video.) [It will be automatically transcoded to the project settings upon rendering.]
I agree in theory about Smart Converter (and all other non-Apple conversion software), but in practice when faced with no other alternatives, I'll take what I can get... except VLC. I personally am not going to spend a lot of money desperately looking for alternatives and SC has an unlimited free version (the only restrictions being: no batch mode and one location to save conversions.) I am more willing to recommend free software over something for which users have to pay simply because I make no assumptions about their ... let's just say: budget for the projects they are working on. If they find SC will work, then they might have more confidence in buying a more commercial product that does essentially the same thing — but that would have to be their decision. In general, the next nearest "pay for" software I actually would recommend is Quicktime 7 Pro... and that's IF they had Final Cut Studio as they would already have that software with all the pro features enabled. The reasoning behind this is that QT uses Apple codecs whereas everything else has to use x264 (which I don't consider as being "the same" as H.264.)
If the OP (is still hanging in) already has Toast, he should try that as well. If he has ScreenFlow and has ANY software that will play the video (he would need a monitor capable of at least 1920x1080 and a Mac with some muscle), he might be able to recover the video via screen capture. He might even be able to simply import the video into ScreenFlow, but I don't want to recommend he go out an buy these products on a " maybe..." BTW, both of these apps can export ProRes/AIFF. If it were important enough and the media could be opened in Photoshop — I'd even try that: convert to an image sequence (PNG); reconstituted as video and exported as ProRes from Motion. I'm not one to accept FUBAR until I've tried everything at my disposal...