Yes,it is shame with no updates or news with NeoPwn.
Backtrack is a program for testing,hacking,penetrating an testing networks or pc.
Infact is a hacking OS with a hundreds programs for hacking.
NeoPwn is a OS for N900 with all those programs.
Imagine that you turn wireless scan on N900 and there are few wi-fi spots available but all with wep or wpa protection.
With NeoPwn v.2 you can crack wep in few minutes.
(On n900 probably a litlle bit more with 600 mhz processor).
And for WPA probably longer but good thing is that you have 32gb(48gb with memory card) memory what should be inaf for nice dictionary.
Just hoping that will dual boot with MAEMO