A post on the Google LatLong blog bring very good news to all Londoners. In fact, they have deployed today a new feature which integrates TFL's travel alert and disruption feed into the application (either the browser based or the mobile apps), so that it's now possible to find out straight away about any engineering work or travel disruption that is happening on the Transport For London transit lines. So this includes real time disruption information as well as planned outages such as the ones so frequent during the weekend.
This is avery nice addition to the Google Maps feature set, given that the London Olympics Games are starting very soon and I bet a lot of people will find this information quite handy.
Read more on their blog post.