cocoaforge

I need a script for Adium which, for example, deletes all contacts to whom I haven't spoken to in, say, the last month...

Is there such a script?

I don't think there is a script that does this yet, but this actually would be a pretty damn useful script.

Is there a space here for requests then?

After having a quick look into this, it doesn't seem to be currently possible.

Expanded AppleScript support is a SoC project so this may be addressed in the scope of intended changes.