Yes, my carb is right side up =P.
Greg58 - Yes, this:
is my carburetor! It's hard to see in that picture, but there's a little metal lever behind the white one that I believe is the choke.
I followed your starting instructions (that's basically what I've been trying), and was still unable to get the engine started. It doesn't sound like there's any combustion going on.
I confirmed that I'm still getting a spark out of the spark plug, and I can see gas flowing into the carburetor.
The folks at Bikeberry told me my engine might be flooded and that I should tip it upside-down for 24 hrs. to drain it. I tipped it over (with the carburetor taken off), and nothing has come out in the first 2 hours.