2010.01.15 13:40 "Re: [Tiff] eta for bigtiff support?", by Phil Harvey
[I'm posting this as a response to a July 2008 thread]
As far as I can tell, it seems that the BigTIFF MIME type (and file extension) have still not been decided.
So I will go with "image/x-tiff-big" for the MIME type, and "BTF" for the extension unless someone can convince me otherwise.