You can make additional Attacks of Opportunity.
Benefit: You may make a number of additional Attacks of Opportunity per round equal to your Dexterity bonus. With this feat, you may also make Attacks of Opportunity while Flat-Footed.
Normal: A character without this feat can make only one attack of opportunity per round and can't make Attacks of Opportunity while Flat-Footed.
Special: The Combat Reflexes feat does not allow a rogue to use her opportunist ability more than once per round.