Jozefs

That would be nice. I think it would be very useful for bigger sites.

Exactly. For example, only index posts from the last 6 or 12 months (it needn’t be more complex than that).

Yes, it works now. And I stand corrected on the shortcode: after installing a new version the feature was somehow disabled. I enabled it just now and it works. Thanks!

I installed the development version on 2.8.6 and it seems to work ok, except for the widget: I cannot change the options (they aren’t saved and always return to de default settings).