I was able to install BT3 on the SDHC card in my Eee with persistent changes. However, I got 2 issues:

1) Turning Wifi with Fn+F2
Pressing that button combo doesn't do anything. I can turn it on from the BIOS, but if I forgot to do so, then I have to reboot BT3. I.e. I was in Windows, turn off WiFi and boot to BT3.

2) Battery meter
BT3 keep complaining that I only have few minutes left on the battery, even though I have fully charged the battery. I made sure the battery is charged by leaving it overnight, then boot to BT3