Sometimes I find myself with a day off and would like shoot. A normal casting call doesn't always work rapidly enough to sort something out.
Might it be possible to have a casting call clearing house where photographers and models can put themselves into an 'available today pool' and then once pairings are made, they drop off the list. Details such as 'can work at home' or 'studio available around the corner' become particularly important to sort things out last minute.
I know I'd use such a facility - perhaps others would too. Or perhaps others feel that the existing casting call system works well enough and I'm not drawing full value from it.
I was amused recently. A model advertised "Shoot today" I replied at 09:30 the same day offering to be there in an hour - and she had logged off! She finally read it at 1 o'clock. Never did get a reply!