Real-time information is curently not available:
http://www.tfl.gov.uk/tube-dlr-overground/status/
"Our data service is currently unavailable. We are trying to fix this. Please come back later."
Oyster account access and online top-ups currently not available:
https://oyster.tfl.gov.uk/oyster/link/sso/0001.do
"Sorry
Important site maintenance means Oyster online is temporarily unavailable. Please try again later.
We apologise for any inconvenience. You may find the following links useful:"
So, maybe they should focus more on fixing what they already have.