[takoi]

So in principle it can be hidden or stuffed away somewhere. There is certainly no reason users should go and install python modules manually, which you currently can!

service != programs

sure, but nobody cares. 'I need twitter' where should i go? (answer: it's a service). Many service and program addon are already both and functionality overlap. "Programs" is a bad name for a category in general too.

I agree with the "more like an app store" idea. Maybe newest/update similar to addons.xbmc.org could be shown by default, then categories filtered/browsed on request. The whole tree structure can be cumbersome at times if you don't know exactly what you want.