For software-center I recently created something that comes close to the gtk login widget you describe here. The code is available in http://bazaar.launchpad.net/~mvo/software-center/reviews/annotate/head%3A/utils/submit_review.py
It needs a bit of refactoring to make it a standalone widget, but it should be mostly there. Please let me know if you are interessted in it.
For software-center I recently created something that comes close to the gtk login widget you describe here. The code is available in http:// bazaar. launchpad. net/~mvo/ software- center/ reviews/ annotate/ head%3A/ utils/submit_ review. py
It needs a bit of refactoring to make it a standalone widget, but it should be mostly there. Please let me know if you are interessted in it.