Works great. I am powering both my Lilliput and my Cappuccino PC off of the output from the ITPS. Just a note for those of you who may want to copy this setup, BE SURE to apply a solder bump as described in the installation manual to disable voltage regulation. It will not work if you dont do this. I found out the hard way.
Also make sure you enclose the ITPS in something nonconductive as the manual states the heat sink has +12v on it. I put it inside a little plastic drawer and wrapped it with electrical tape afterwards.
Also here is a picture of my modification to the Lilliput.
If you look closely you will see a small switch attched to my new 9 pin connector. The switch is wired to both sides of the screen power button. When I want it to turn on automatically I leave it switched ON. When I need to adjust some settings I turn it OFF. When it is in the ON position you can still manually turn the screen off and on by hitting any button besides the power button.