LOL, love the pic of the sexy shrimp, and that goby is AWESOME! I can't see to well in the top pic. Can you either post a bigger pic, or closeups of the corals?
The rock work looks nice and natural, and there's a good amount or coraline on there already.
As far as the super glue goes, it's perfectly safe as long as it's cyanoacrilate glue (most superglues are). I'd strongly recommend the 'gel' variety instead of the liquid. Reefers use it ALL the time. It instantly activates when the water hits it, so there's no contamination. Take out whatever you're gluing, dab it dry (as best you can, just so there's no standing water), apply plenty of glue, and stick it in place. Try to get it in place as quickly as possible as a skin will form immediately and the glue will start to cure. Hold it in place about 30 seconds and check to see if it's secure. There are some corals that you can't glue, so we should try to ID what you have first. Trying won't hurt them, some just won't stick.
The tank is looking really good, especially for a first tank!