This thing assumes you're running diablo kernel
emerge sys-kernel/diablo-sources eselect kernel set linux-2.6.21-diablo cd /usr/src/linux && make nokia_2420_defconfig && make modules && make modules_install
Install sys-apps/n8x0-env with USE='nokia-osso-linux wifi' from n8x0 overlay.
Configure wifi connection. This is out of scope of this document, please refer to Wireless Networking chapter from Gentoo Handbook.
Symlink net init script:
cd /etc/init.d/ && ln -s net.lo net.wlan0
Add net startup script to boot sequence
rc-update add net.wlan0 default
Start /etc/init.d/net.wlan0 and your tablet should connect to wifi AP.
Don't do this in chroot.
/etc/init.d/net.wlan0 start
You may also want to add sshd to boot services in order to access tablet from other devices
rc-update add sshd default
Install sys-apps/n8x0-env with USE='bluetooth' from n8x0 overlay.
Add bluetooth to startup scripts
rc-update add bluetooth default
Start bluetooth service
Don't do this in chroot.
/etc/init.d/bluetooth start
Configure whatever bluetooth devices you need (see Gentoo Linux Bluetooth Guide for details).