I tried your kernels as well. The previous ones could boot the O2 (with
180 Mb memory), but fb did not work. The network interface was brought
up as well (could ping it), but booting stopped directly after that.
I now tried the latest kernel and the fb works. Booting still halts
after bringing up networking. When I skip networking, the O2
boots normally. Unfortunately, the keyboard also doesn' t work, so
alltogether I cannot log on the system to play around.
The point about where networking seems to give trouble (during boot and
also shutdown) is the "IPv6 over IPv4 tunneling driver", this is the
last message I get on console & in syslog.
You can find the bootlog at: http://www.itc.nl/personal/vdwerff/o2boot.txt