Andi Gutmans has posted his Take 2 of his look at the Zend Server product Zend offers and how well it works on Linux.
How many [linux] vendors do you know who go out of their way to not deliver a custom installer or monolithic rpm/deb package but actually build native rpm/deb repositories for the various distros? Call us crazy but our goal was to make this the best possible, most integrated experience for our users and we were willing to work very hard for that.
The post includes screenshots of the linux interface and how Zend Server works to find updates to the software right inside of the normal OS-level package updater.