Instead of following the installation instructions, I just made a single ext3 partition, with a /boot directory containing the usual files needed for Qi to boot.
The time and date are off. I opened a terminal and did "dpkg-reconfigure tzdata". Then set the UTC time with "date -u -s".
Instructions for http://trac.hackable1.org/trac/wiki/tips worked, except that the USA T-Mobile provider is set up to use wap instead of real internet. So I edited the provider file to say internet2.voicestream.com instead of wap.
I also edited the chap-secrets file -- was this necessary? It kept trying to use chap auth, but I think there might be another reason for this. I'll do a clean test.
It doesn't use the muxer by default, which means that while you are on GPRS, calls and SMS won't get through. This can be changed by switching the MUX option to yes in /usr/bin/x and /usr/bin/p.