The Sony Vegas Movie Studio 8 Platinum software really loves my Sony HDR-UX1 AVCHD streams; but I suppose that's no surprise.
The press releases for the forthcoming version of Sony Vegas Movie Studio 9 Platinum underscore that this next version will support AVCHD -- not just from Sony camcorders -- but also from Panasonic and Canon camcorders.
So it would seem there's going to be at least *some* progress.
But I agree with you; I wish they would program the software to support the native Quicktime .MOV HD H.264 streams. Maybe that will be in the new version as well. We'll wait and see. This issue does seem to have been a lazy oversight where the current version 8 Platinum software is concerned.