As Shepherd says, it's the goal of not having a goal. ;-)
For me, flow is about taking a break from growth-inducing activities. Life doesn't always accommodate that desire, but if you can squeeze out one mini vacation after another, it's surprising how good that can feel. Okay, so I'm being a bit delusional here. Though, I think that Big Lebowski guy has it right -- at least in theory. ;-)
Best,
Dave
P.S. - Still working on the MT site update. It's taking an eternity.