I did not want to threadjack which is why I kept it to a minimum.
this is also why I said think the Calendaring sketch wall is a simple logical application principle to start with.
its an easy thing which shows the principles well and can be adapted and changed to multiple purposes.
I will ensure by the time of the meetup that the calendar is completely standalone and available, just need to extract it from the playground itself and put a package round it.

I have been to some barcamps recently and they have a real world paper based grid which the sketching/calendaring ui would work well for.
pic here: http://liqbase.net/barcamp_grid.jpg

I've been a bit tied up this last week or so sorting out a dayjob (having some form of stable funding is much more important than anything for the family)