internet - Can I reverse tether my Android device to my phone using Bluetooth PAN or DUN?

I have a Sony Ericsson K800i phone that supports both bluetooth PAN and DUN.

Is there any way to share my phone's internet to my tablet (cheap achinese Aishuo A820 with Android 2.3.1, rooted). For now I don't care if the method requires root because the tablet is rooted, but if it's possible to do it without root would be great.

I've looked at https://android.stackexchange.com/questions/7817/reverse-tether-on-android-via-bluetooth-pan but it only appears to cover PAN (not DUN) and asks about tethering a phone with a PC. Since I'd like to tether two mobile devices I'm guessing that there will be fewer software options available to me.

I'm ok with writing shell scripts and I have some Linux experience, but not with bluetooth.