These ebuilds come from http://luke.dashjr.org/programs/gentoo-n900.
If you have some problems, go to the official site first.
xf86-input-plpevtch : Evdev based touchscreen driver ( http://www.plop.at/en/touchscreen.html )
xf86-input-tslib : xorg input driver for use of tslib based touchscreen devices ( http://www.pengutronix.de/software/xf86-input-tslib/index_en.html )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a n900
For Paludis use this rsync : rsync://gentoo.zugaina.org/n900-portage
If you have a problem : ycarus(-at-)zugaina.org