For what it's worth -- I've shot some TVCs (in the UK) on the older 35mbs XDCAMHD cams. The 1440 footage was directly ingested into Final Cut and upscaled to 1920x1080i .mov for delivery. ITV (client) broadcast engineers have never complained, although there's no excuse for HDV nowadays when pre-approved full-res cams, e.g. EX3, are so cheap to hire. (Presumably affordable on a TVC budget, anyway.)
If the budget also covers the portable storage, then Todd's tip of bypassing all HDV cameras' capture devices and tapping it straight out uncompressed is essential stuff -- and will probably put a smile on your face when you finally view the image your sensor is really capturing.
Darren.
