It is an interesting and useful tool. Their Nabble description isn't up-to-date because they say we don't have features like user registration, user groups, backup, etc. and this is not true. They also say our latest release was on December 2009. We release our code almost daily and I have no idea why they say that. Besides that, our templates feature (to be released soon) will make a huge change in those properties because almost anything will be possible to do. Users should wait and see.
It is difficult to predict, but we still need some months. Soon we will add another member to the Nabble team to help with support and other things. This will give me time to work on templates. But note that users from premium support can request changes to their templates (like adding skins, etc.). So your friend could use support while we get templates out.