2015-04-29 APN I have set up an feed that aggregates Tcl related announcements - software releases, new blog posts etc. using yahoo pipes. For those unfamiliar with yahoo pipes, it provides the feed in a number of formats including RSS and JSON. You can also clone and modify the pipe as per your preferences.
The feed was available from http://pipes.yahoo.com/tcllang/announce . Now it is defunct due to the closure of Yahoo Pipes.