Kramer PiP
Krammer PiP (Picture in Picture) does exactly as you'd expect. It has two inputs and one output. The output can be either one of the inputs, or it can be a small version of one input on top of the other.
the size and position of the inner image can be altered by large amounts, or by finer increments. Also a border (of the desired colour) can be placed around the small image.
It hasn't been used much, in fact not at all in 2008/09, but has potential to give small wideshots of events at OBs while the presenters are talking.