ftp.us.debian.org issue?

[Dave Barnett <barnetda@blueriver.net>]

For the last several days, I cannot run apt-get update on my Ultra 10 
running unstable:

Get:4 ftp://ftp.us.debian.org unstable/main Packages
Err ftp://ftp.us.debian.org unstable/main Packages
 Unable to fetch file, server said 'Failed to open file.  ' [IP: 
35.9.37.225 21]
Fetched 1B in 2s (0B/s)
Failed to fetch 
ftp://ftp.us.debian.org/debian/dists/unstable/main/binary-sparc/Packages.gz  
Unable to fetch file, server said 'Failed to open file.  ' [IP: 
35.9.37.225 21]
Reading package lists... Done
E: Some index files failed to download, they have been ignored, or old 
ones used instead.


I manually go to:
ftp://35.9.37.225/debian/dists/unstable/main

and the directory binary-sparc does not exist.

My sources.list shows:
deb ftp://ftp.us.debian.org/debian/ unstable main
deb-src ftp://ftp.us.debian.org/debian/ unstable main

deb http://security.debian.org/ etch/updates main

I don't believe this is anything I can change myself -- or is it? -- so, 
what is my next step?

Thanks in advance.

Cheers,
Dave