Courtesans Guild Crest
Get each Guild to Level 2

Thieves Guild Crest
Get each Guild to Level 2

Mercenaries Guild Crest
Get each Guild to Level 2

Marias Dagger
Get each Guild to Level 3

La Volpes Bite
Get each Guild to Level 3

Bartolomeos Axe
Get each Guild to Level 3

Assassins Guild Crest
Complete all Assassins Guild Challenges.

Sword of Altair
Complete all Assassins Guild Challenges.

You will unlock these at Ezios Hideout.

Assassins Creed: Brotherhood Uplay Rewards

Xbox 360/Playstation 3 Theme
Sign up for Ubisofts Uplay service and spend 1 token.

The Hellequin
Sign up for Ubisofss Uplay service and spend 1 token.

Pistol Upgrade
Sign up for Ubisofts Uplay service and spend 3 tokens.