Video recording length on HX10, 20, 30V... Is there a limit?

I have seen conflicting info regarding this so I thought I would ask here. Other than the size of the SD card is there a 29 min limit to the video recording on these cameras in North America? I know that the NA version of the LX7 is only limited by the size of the card in one of its video modes. I just need to figure out if it will be the same on the Sony. I realize that either the SD card size or the battery will also limit the time.

Thanks for the help.

--
Sam
'Those who fail to learn from history are doomed to repeat it... albeit probably in colour the second time around.'