hah hah hah ha!!!!!!!!! I've got the answer!!!!! Behold!: http://cgi.ebay.com/GTW-M275-14-1-TA...QQcmdZViewItem
now imagine that this is the display for the gateway cx210x, which is 14.0 wxga (sameish aspect ratio as the macbook). replacements for those will be available just like this soon. just wait a bit. byt the time a core2duo mbp is out I betcha.
so. MBP operates with the lid down, doesn't it?
no need at all to detect THROUGH the display, when you can just build a custom housing that slaps it on TOP of the closed display. not to hard to do with drivers I think, either. just rig it to use a function key, hit the key to go to tablet mode, then when you close the lid, poof! tablet display boots up! two advantages here: no nasty warenty voiding (can build a nice streamlined interface with dvi and usb to use the built in ports); if you're typing and need to switch all of a sudden to draw something, just close the lid, and you're drawing, then open it back up, and keep typing; the digitizers that gateway uses are actually not made by wacom. they are made by finepoint, and rather than emiting a signal which is reemited by the pen, the pen has a battery in it, which allows the digitizer to read all the time. about 10-20x less power consumption. better spent on good gpu anyway, ne? The only tricky part will be the electronics to convert from whatever interface the gateway display uses to a standard (or perhapse not so standard? super flat profile?) dvi and usb interfaces; finally, when installing winxp tablet edition, just use the drivers from gateway. oh, one bad point, there aren't any drivers yet for MacOS, though FinePoint reps have told me that they have a company working on one.
Hmmm, or, even better, rather than shutting off the tablet display, allow it to optionally run simultaneously...... wooo batery drain.