Because same problem (which i never viewed as a problem before now!) as the OP! I do not see the blank disc represented anywhere in OSX. I only see burnt disc's and retail CD's & DVD's, I've never seen a blank disc show up anywhere! The only time i'd know there was a blank disc in there is when the Burn button becomes enabled.
Blank CDs and DVDs for burning ALWAYS shows up on my desktop! Just like ANY HD icon, or external plugged in to any port. Make sure you have your preferences correct in the CD/DVD Hardware Preferences Panel.