Hey Akshay,
I am the CTO of Perfect Audience and we also offer a retargeting solution with no minimums and no required account managers. You can just come into our site, create a campaign for Facebook or for Web advertising and be running within minutes. We cover same Google-specific inventory plus more than twice as much web inventory and we have access to the Facebook Exchange, which most likely Google will never get access to 
If you have any questions, let me know.
Normally we have a $60 or 2 week free trial but I would like to bump it up to $100 for anyone from SEOMOZ who signs up - just respond to this thread or shoot me a message on SEOMOZ and I can get you setup.
Jordan Buller
jordan@perfectaudience.com
http://www.perfectaudience.com
