Just a couple days ago I published the Image Quality section of my E-PL1 review (WARNING: Shameless plug!):
Review – Olympus Pen E-PL1, Part 3: Image Quality & Conclusion | Enticing the Light
I liked the JPEGs so much I had to give them their own section
The E-PL1 is the camera that could make me convert to JPEGs for colour work. That's how good they are. And from what I can tell, the E-PL2 has all the good bits of the E-PL1 plus a few important improvements.
Andy, you'll enjoy your E-PL2, I'm sure.