One of the most powerful features for a busy shop is also one we hear a lot of complaint about. Cloud Print. If setup in a reliable way, with the right printers, and if you know how to troubleshoot properly - it's a total breeze.
Recent blog post from us on how to run it reliably: http://www.repairshopr.com/blog/posts/cloud-print-how-to-setup-printers-for-little-trouble
And a quick overview video in case you haven't tried it yet:
CloudPrint is really the only tech that we've been able to find that does something like this, although it can be frustrating if/when it suddenly stops working, it's usually working and usually really handy.
If you haven't tried it lately, try setting it up after reading that blog post!