Buy Parallels Plesk Sitebuilder 4.5 for Linux/Unix
Parallels Plesk Sitebuilder for Linux/Unix is designed to publish sites to a single server by default (Plesk or non-Plesk). Plesk Sitebuilder for Linux/Unix purchases include Software Update Service (SUS) that entitles you to upgrade your software to new versions for 1 year from the date of purchase.
For larger installations of Plesk Sitebuilder, multi-server publishing and clustered services contact your account manager or nearest Parallels sales office http://www.parallels.com/contact/.