Support for WFS (Web Feature Service) layers: http://en.wikipedia.org/wiki/Web_Feature_Service
Should probably go into a plugin. Not for the core.
Michael Moore commented
I've started on a WFS-T plugin here: https://github.com/flatrockgeo/leaflet.wfs-t
It's currently alpha quality, but it's something.
This is one of the last features keeping me using OpenLayers. Thanks for your work on this.
+1 would be a great addition
+ A transactional Web Feature Service (WFS-T) allows creation, deletion, and updating of features.
This would be really great.