Along with the other post lately that say that the 40 crit scopes work on the boa and boe guns/bows, I just saw in a bg, a hunter with a +15 dmg scope (http://www.wowhead.com/?spell=61471) I think, which was critting people for over 900 on a 29.
Granted, they have already fixed this on the PTR, so its only a matter of time before they fix it, but hey, if you have the gold, you might as well have some fun while it lasts.
Just apply it on your main and send to the twinks just like the others.
Have fun while it lasts :wave: