Hi, My name is Michal and I am totally blind relative new user of TW (few weeks). I absolutelly love it. It is robust, extensible and accessible web app to create wikis as knowledgebase.
Here in Czech republic we create some advanced knowledge bases about enterprise architecture and eGovernment (in czech lang only, sorry) - and TW seems to be ideal tool. We cnow converting our KBs from other solutions to TW and deploy it in prax. Great tool.