Hey folks, I've implemented an RFC2090-based "open-loop" multicast  
TFTP server for NetBSD. This requires -current as it uses proplib.

The -current tftp(1) is able to transfer files from this daemon, but  
is not currently optimized to accept packets out-of-order. Any  
compliant RFC2090 client will just work with a server in open-loop mode.

More information (along with download) here:
     http://www.invisible.ca/space/netbsd-projects/multicast-tftp-server

Feedback is welcome.

Cheers,
Jared