In an earlier post I mentioned TiddlyWiki and my applications of it here and there. News about TiddlyWiki is best gathered by becoming a member of the relevant Google Group: one is for users in general and is mainly used for announcements and questions and answers - post a question and you'll usually get a very quick response from someone in the Group; the other is for those with the necessary technical skills to develop applications on TiddlyWiki or to contribute plug-ins and modifications.
Scanning both of these groups can be useful if you get into using TiddlyWiki: for example, a recent post drew my attention to Dave Gifford's Notes wiki, which is a nicely customised version for note taking with an excellent means of generating lists from the tags: you can get a version for yourself, if you right click on this link and then "Save link as...". That wiki advertised Dave's BibblyWiki - a version for creating and displaying bibliographic records of books and articles - again, get a copy by right clicking on this link and going through the same process. There's also a version in Spanish
The Developers' Group brought my attention to a number of things: a version of the basic TiddlyWiki in Brazilian Portuguese, and another in Portuguese Portuguese, and a very clever bookmarklet, which replaces the built-in search module of TW with YourSearch - not easy to describe what happens as a result but it means that you can search any TW with YourSearch. Of course, you need Firefox as your browser, although we are told that it may work in Opera and Safari