I encountered Aria in the bar on the Citadel, and she offered to lend her influence over the criminal/mercenary gangs if I was willing to solve a few problems for each gang or its leader.
I'm playing a full Paragon run though, so I'm trying not to be overtly evil.
Is it wise to trust Aria? Should I be encouraging and aiding these criminal organizations?
How much are they worth as far as War Assets are concerned if I help them? Will I run into trouble later on as a result?