Karsten - excellent suggestions.
I'd like to add my voice to this
topic. I suggest that
Mediawiki.org needs to install SMW so that
extensions' installations can be programmatic. I am working on upgrading
SMW+ extensions to MW LTS, one of which is the Wiki Administration Tool.
Redesigning that extension to be more palatable to the SMW community has
convinced me that
mw.org needs to have publicly accessible data about
each extension, most importantly dependencies.
- john