If you mean parallel-ssh (apt-get install pssh on Debian), you can do this quite simply this way.
parallel-scp -h ips localfile /remote/path/file
If you meant pdcp, which is part of the pdsh package, I would pass on it - I just gave it a try and it would seem it requires pdcp to be present on the remote host, unlike parallel-scp. So I would stick to the former if you can - but if you must you can try this:
hosts=`cat ips | tr '\n' ','`
pdcp -R ssh -w $hosts localfile remotefile
This assumes ips has a host per line. It reads it and replaces the newlines by commas, thus creating a list in the format expected by pdcp. You can skip this step if you already have a comma-separated list of course.
