I'm seeing the same boot delay after upgrading to 208-6. Replacing 'allow-hotplug eth0' with 'auto eth0' fixes the issue. I put some debug statements in /lib/udev/net.agent (function net_ifup) and found the following line to cause the delay: 'wait_for_interface lo'
For some reason it takes 'lo' now ~30 seconds to transition from 'down' to 'unknown'. This happened pretty much instantaneously with 204-14. ...Juerg