Anyone have any luck opening an MJPEG AVI file in Vegas?

Yes, I have a luck, and I have Blackmagic Codec from Intensity 4k.

Thanks for the reply. So with the Blackmagic Intensity card installed Vegas is able to open AVI file using their codec.

Virtual dub also works to convert MJPEG to "regular" .avi files which can then be used by Vegas.
Worked well for me with MJPEG files from a time lapse camera.

Thanks Ken, Will give it a try.