WebStar is a useful web server solution if you want to run an intranet or internally test perl/PHP scripting, it was quite popular pre-OS X and the company sadly EOL-ed the product sometime in 2007. It got gov't usage by the Army before the XServe launched, performance of WebStar was ~15% better than OS X Server and fairly secure out of the box.
If you don't care about OS X I'd suggest setting up a LAMP server via Lubuntu, you could roll your own cloud storage solution on the home network and also create/develop/test web-based software.
As far as storage sharing of OS X, bottlenecking is common from multiple small file syncing/copying if there is multiple connections to the Mac. OS X supports 5 users on a disk share, OS X Server is unlimited. As much as I may love Apple, OS X for network share performs really poorly compared to Linux & Windows.