Interesting you mention backup to tape. Boy we are glad that we stopped using tape and jumped to the cloud. With tape we could never be sure that our tapes are a) working

b) available when you need them c) secure
I remember this one time when one of my buddies got a call from his boss and he broke into a sweat has he tried to restore from backup!
With backup to the cloud I dont have to worry. Testing an offsite backup is trivial - just click on the file or download it using command line scripts.
We are actually using secobackup to setup a standby site on EC2 for testing. Here's a neat setup we use
Local DB on RHEL -- secobackup, daily backup --> Amazon S3
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daily secobackup restore
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V
EC2
Now we will end up with a test and reporting standy on EC2 that can be refreshed daily.