apt-get update hangs

[Project Manager <project.manager@web.de>]

Hi all -

On my debian 3.0 install, "apt-get update" simply times out spitting 
errors that "connection timed out", with folln output

   Err http://ftp.de.debian.org woody/main Packages
     Could not connect to ftp.de.debian.org:80 (141.76.2.4), connection
   timed out
   Err http://security.debian.org woody/updates/main Packages
     Could not connect to security.debian.org:80 (194.109.137.218),
   connection timed out
   Err http://ftp.de.debian.org woody/main Release
     Could not connect to ftp.de.debian.org:80 (141.76.2.4), connection
   timed out

However pings to these sites are successful.  And being http requests, 
there shouldn't really be a limit on number of simultaneous connections.

Why isn't my apt-get able to connect to these sites.  No proxy in the 
way, no firewall - and "apt-get" works from my other debian machines.

Thanks in advance,
Jonnas