Vault Robbery will be enabled at some point within the next 24 hours! So your best bet is to probably start keeping track of which gang's don't have very secure vaults and which gangs have a lot of money in them
All vaults will have a small boost in their condition (likely only 10-15%), so there's been enough warning now, make sure to try secure what you can!
The Rob Vault link will be displayed right next to the Spy link on gang pages, just so you know where to look!
Also, be sure to check out the
2011 Mega Photo Competition. There are plenty of easy prizes, and every single entrant gets a small prize just for entering!