Due to changes to the TfL website, the high costs of maintaining this service, and the fact the TfL now provide their own API, this site will shut down on May 15th 2014.
This entire project came about because I created a basic RSS feed that served up the current tube status as scraped from the TFL website. As it became more apparent that people wanted more control over the data, I created the API. However, there are still a few people who would prefer an RSS feed of the latest updates rather than having to write their own application. You can get those RSS feeds here.
I have created one feed that contains the latest updates across all tube lines and then there are individual feeds for each line.