Status and usability of Linux ATM as of 2.6.0?

Hi, is there anyone out there in the wide blue yonder using ATM cards
with Linux? The linux-atm mailing list is a traffic of developer
messages, but I'm curious about users out there and the stability of
their cards.

I am curious about the back-to-back configuration of cards with no
switches, where atmsigd emulates a switch. This supposedly works, but
for the pile of Collage 25 Horizon Madge cards that I have it has been
dumping symbols for every kernel version and every linux-atm version
that I've tried. I'll get an ATM switch soon, but was curious if ATM
has been a smashing success for anyone, better yet if anyone has been
using it in a production environment for a while.