Any body know what the deal is with tickets for Shanghai Expo?

I send this question out before.  I thought a world Expo is all over the city that hosts it.   How is it said that you get 'a' ticket?  Does that mean that 1 ticket gets you into all exhibits and pavillians, museums, etc. that has Expo exhibits in them, etc.???

I always knew World Expos have activites 'all over' the City that hosts it.    Somebody let me know.

And is anbody planning to go to Shanghai this year for this???

Jeff

Just found out that my husband has a business trip to Shanghai next week and I will go with him to see the Shanghai Expo.  Has anyone been yet?  What exhibitions do you recommend seeing?