This site monitors the status of blockchain.info and all its related services. If there are any interruptions in service, a note will be posted here. This Site also stores encrypted backups of all wallets. Should anything happen to blockchain.info you can download a wallet backup here.
For instructions on how to restore a wallet backup and recover your coins click here. In the event of a server compromise you may be automatically emailed a wallet backup.
An admin must first enter the correct encryption key before wallet downloads are enabled.