it would be useful to have rounded(beveled) edge cube,with options for bevel radius,bevel resolution(no. of edges),cube dimensions.i hope someone is interested in scripting it.thanks:)
do you mean something like this? : http://wiki.blender.org/index.php/Extensions:2.5/Py/Scripts/Add_Mesh/Add_Solid
You can simply apply a subdivision modifier to the cube and play with the edge crease:
<shift>+<a> -> geometry -> add cube
select “smooth” shading for the cube
select cube
<ctrl> + <zero>
in toolshelf choose for instance subdivision level 4
<tab> for edit mode
if not already, change to edge mode and select all edges
<shift>+<e> to change the edge crease
i have added image.subsurf will add too many faces.now it can be done with edgebevel(Wkey).but,with a script it is faster and precise.