Okie... there are a few people there you can ask for help in creating a distraction at the Thalmor embassy party, many of which you have to help first: Help Jarl Idgrod with the Movarth problem, help Ondolemar with his jackbooting duties in Markarth (the after-incident debriefing for him must be awwwkwwaaaarrrrrd... ), help East Empire Company Guy Whose Name I Forget with the EEC's problems in Windhelm... or simply go to Erikur or that drunk guy if you haven't ingratiated yourself to any of them.

...But can you ingratiate yourself to Maven and have her make the distraction?