Nick's recommendation about registered servers is spot on.... and if you click New Query on a particular group, you can run a query across that group. It's great for admin queries like checking each database is recently backed up etc.
Registered servers also allows you to export the file, and share that listing with colleagues - so they don't have to type the list in.
And when you are ready and need to, the next step is possibly a Central Management Server (CMS). It's a "special" SQL Server where all your servers can be registered, and this list can be used by all your DBAs and developers. A CMS can help with Policy Based Management as well.