2010 13" 2gb ram 128gb hd 1.83ghz. Plays fine on pokerstars. I use controllermate and blazing stars to map my bluetooth ps3 controller and for hotkeys. Poker tracker 3 as well. I can easily encode a video using handbrake while watching a video in quicktime and play poker with all my hotkeys etc running and other than a loud fan everything is super smooth.
My 2008 Dell 1318 13.3" 2.0 c2d 3gb ram 320gb 7200rpm hd will run the same setup with windows based hotkeys programs but it is nowhere near as smooth, especially with the controller.