glade file can be gziped to save space
PyGTK/glade can read gui from a gziped file. This can be usefull to save space:
$ du -hs gtkgui.glade.gz 48K gtkgui.glade.gz $ du -hs gtkgui.glade 752K gtkgui.glade
This is not really important on regular device where you have plenty of Gb, but on device like PDA where every Kb is important because you have 16, 32 or 64Mb for all system, saving nearly 700Kb is good.