http://www.ocp.inf.ethz.ch/wiki/
There are still some students and external guys keeping the ports going.
http://www.ocp.inf.ethz.ch/forum/index.php/board,4.0.html
Nowadays, I think Oberon spirit will live in Rust, D, Go, C#. :)
In terms of the language, the Oberon 2 language report is 17 pages of which 1.5 pages is the full EBNF for the grammar.
Then again, looking at the new stuff from the people keeping Oberon alive, it seems much less interesting to me as well.
I did like Oberon a lot, as a GC enabled safe systems programming language with module support, and the ideas of Native Oberon exploring Smalltalk dynamism in a static compiled language.
As for Wirth's minimalism, specially the latest Oberon-07, I don't like it that much.
D - Xomb - http://wiki.xomb.org/index.php?title=Main_Page
Go - TinyGo - http://code.google.com/p/tinygo/
C# - Singularity - http://singularity.codeplex.com/, Cosmos - http://cosmos.codeplex.com/
The main problem is lack of support, it is a very big effort to create an OS and it is very easy to turn attention to other stuff.
Linux and BSD distributions wouldn't have reached the state they enjoy nowadays, without the help of the existing UNIX toolset and investment of companies interested in seeing the projects succeed.