A Multitude of Putty Sessions
Many hands may light work, doesn't really work with in IT. I usually look for consistency and reproducible results. So let change this for one hand and many windows make light work!
Come across a nice tool PuttyCS for Windows people which did just the job.
In the Solaris world I would use Sun's Cluster Console on CDE, but other seem to favour Cluster SSH or PSSH.
I would be amiss to say, a better answer to issues above is to automate and use confguration management tools such as Chef and Puppet.