We've got a multi-homed customer that also uses them... I tracerouted out
from the CPE into Netcom, and it only got one hop in, to their San Francisco
routers... Died before getting down to their San Jose stuff. I don't know
much about their internal architecture, so I can't speculate what that means
precisely. We called their tech support number, and got a message that they
were having a "general network fault" or some such. 
We first
noticed it just after 3:00pm yesterday, Tuesday.
      -Bill Woodcock