Considering the feedback from this thread, it definitely looks like something we need to fit back in and will be among the things we'll work on for the next iteration/deploy. Thanks for the feedback and kind words, it's much appreciated seeing as we've been working on this for a while now; it easily becomes hard to look at things with a fresh pair of eyes after a while, which is definitely needed for giving a good first impression imo.
I just wanted to add my voice that I think it'll be useful for developers to know what you guys intend to do with the open source version now that you've the Enterprise version. A comparison table like mlitwiniuk mentioned would be useful.
Would also like to know when the open source version of Passenger 4.0 will be available so I can decide whether to pay for a few Enterprise licenses now or hold on.
The Open Source version of Passenger will always be our core product, and it will be maintained and developed just as it always has been.
Phusion Passenger Enterprise is a set of features added on top of the Open Source version, to add stability and deployment features to high performance applications. As Ninh posted earlier, we are working on a direct comparison table to make the differences more clear.
Because Passenger Enterprise is built directly on top of Passenger Open Source, both versions are always released in tandem. This means that Open Source 4.0 and Enterprise 4.0 will be released at the same time.
There's no need to hold on to buying Enterprise. All Phusion Passenger 4.0 open source features will become immediately available to Enterprise users. We also have some more Enterprise-only features planned for the future, and we will be announcing them on our blog.