Thankyou Dave, very helpful.
One of the reasons for going with 30P is we are generating web content in addition
to HD & SD video and progressive is obviously the way to go for content that will be
viewed on a computer screen. I think strange things happen when exporting to various
web codecs like wmv, and h264mov when exporting from a 60i sequence when the data
is Progressive, eventhough everything appears correct on screen in Final Cut. I have been
playing with options, when available, for things like upper/lower/none dominance, interlace
or Progressive input, Progressive output, Transcoding to Progressive HD Movie first, etc…