how do i restore my wiped erased imac OS X My iMac was stolen,using the find my iphone app I erased, wiped it. 2 days later I got it back. I'm trying to get it workin again.Was told to take it to a apple dealer to be fixed.The closest one is 200km away. Any help would be great.
Unfortunately if this would be so simple, the whole feature would be useless. 
If you have a time machine backup, you could get it back online. The other possibility is to use forensic software to restore the disk like http://www.prosofteng.com/products/data_rescue.php.

As long as you are not using FileFault, there is at least a chance.