I've finally gotten around to porting one module to gnome-doc-utils (Shaun's awesome build system for documentation). The chosen module was (surprisingly) gnome-hello. I haven't committed anything yet, but I've generated a tarball (with Serbian documentation as well — figures are not yet installed due to bug in gnome-doc-utils; copy them over manually for now).
I've also posted a preliminary instructions for gdu-enabling your modules (there're also some missing features from gnome-doc-utils, which are described there as well). Until all of this is committed (updates to gnome-doc-utils, gnome-hello), you can follow these manual steps to enable documentation translation with PO files for any of your modules.
When gdu-enabled, your translators will need only to put
translated .PO file into help/LANG/LANG.po.
And for those unaware, this process has a new name as well: