Want to keep up-to-date on the latest R packages released to CRAN? Dirk Eddelbuettel's CRANberries service now tweets the release of new R packages to @CRANberriesFeed, so all you need to do is follow that user on Twitter.
R hackers may also be interested to see how this Twitter feed was implemented -- in R, of course. Dirk has shared the details of how the feed is automated by a 3-line R function (and some supporting packages) on his blog.
Thinking inside the box: CRANberries is now tweeting