what about this for ext record in real time

[oleg]

http://www.m-sys.com/Content/Products/FFDFamily.asp
or this
http://www.bitmicro.com/products_edisk_35_ide.php
for real time capturing 720

[OliverM]

Not bad. But what do they cost? An donly the second ones can cope with the 100mb/sec datastream.
Anyway, you'd still need a housing and a connector adaptor... An maybe even an interface. But this could worth making into a Firestore-like device. Hello, focus enhancements?
But my main question stays, what would it cost?