Whilst having a coffee with a colleague at:
http://www.sixeightkafe.co.uk/I noted (well you'd have to be blind to have missed them) some pinhole photographs on display. Of buildings etc from the surrounding area.
It appears that as part of the Birmingham Architecture project, Matt and Pete's Photoschool
http://photo-school.co.uk/ co ran a pinhole workshop, and the photographs in the coffee shop were from this.
A brief report on the workshop and a small selection of the photographs can be found here
http://photo-school.co.uk/birmingham-architecture-festival-report/Unfortunately, the coffee shop was quite busy so I was unable to get a good look at them all, but they will be on display for most of June so plenty of time to go back when they are quiet.
Mike
