This is happening to alot of people, i do not think that you have been banned, i am sure that jagex are working to try and solve the problems they have with the GE and friend lists etc.
Hopefully everyone should be able to log on in a short while, anyways lets see
Someone made this exact same thread the last time this happened.
We all explained to him how the login server being offline has nothing to do with his being banned or not.
Save everyone's time and just use the search button next time.
Okay I get the server was down but no one is making you read this and respond. You can easily save your own time and not respond and continue on your merry way.