What is the status of Marble?

Hi, Can somebody tell me the (development) status of Marble (Qt version)?

It seems that is just the application I’m looking for, but I encounter many problems in getting Marble to run (a few examples I could make to run, but not out of the box). The documentation looks very old, examples do not run etc. This all makes me wonder: is Marble dead?

Thanks in advance,

Bertwim