PHP on WinCE

I know; it sounds insane, but has anyone tried compiling PHP for WinCE? A client is potentially interested in a "micro PHP" application for PDAs that will keep in sync with the master application on an (inter|intra)net. I'm thinking that a lightweight php cgi/cli binary is all that is needed, along with that http server written in PHP that Jason (IIRC) has been working on. I've got a bunch of WinCE dev tools as part of MSDN, so I don't mind starting the effort on a port in a couple of months time. Anyone out there got any comments/suggestions on this? I'm trying to gather some "intelligence" on the matter before recommending it to the client. --Wez.