VanLazarus writes:
"Of course, I can rerender these all to uncompressed RGB clips and consume hundreds of gigs of hard drive space. I haven't tried converting them to DV format because I was under the impression that DV is a format geared toward interlaced video. Perhaps I can try using DV.... it is considerably smaller than uncompressed RGB. Is it possible to convert a clip to DV outside of Vegas? (I don't want to use Vegas as it's not geared toward simple conversion of files) Are there any free DV codecs that can be used within VirtualDub?"

Good question about using DV for non-interlaced material. As for free DV codecs for use within VirtualDub, according to http://www.sundancemediagroup.com/articles/deshaker_guide.htm, you unfortunately can't use Vegas' DV codec in other programs, but you can download Panasonic's free DV codec from http://www.free-codecs.com/download/Panasonic_DV_Codec.htm. And others have mentioned Lagarith and Huffyuv, which should avoid interlaced-only limitations.