I was thinking that as Dia .shape files are a very small and simple subset
that we should try and encourage open source vector graphics project such
as Sodipodi Sketch and any other projects that already have SVG support to
expand it to allow export and or import of Dia .shape files.  

To support Dia .shape file only requires very basic SVG support.  
On import connection points can be ignored unless the program supports them
and on export connection points can be ignored or simply be automatically
added on corners and line ending and perhaps the midpoint of the shape.  

This is a tracker report and will include links to feature requests for Dia
.shape support in other applications.