Thrall asks you to take the [Lieutenant's Insignia] to Neeru Fireblade. You pretend to be a member of the Burning Blade, gain Neeru's trust and he will share some interesting information with you. With this information you report back to Thrall.
This quest chain has a loose end, but no follow up has been implemented, yet.
Also this quest chain becomes avaliable only after you meet two conditions: you must reach level 10 and you must already have compleated [7] Report to Orgnil quest.