In Brazil, there is a e-legislative solution based in Zope called SAPL (Sistema de Apoio ao Processo Legislativo or Legislative Process Support System). It's quite functional and it's installed in a lot of different legislatures across the country. I have met the team and briefly worked on some possible extensions for it.
And, BTW, it's open source, so, if you want to play with it, you can.
thank you, Sunlight Foundation.