First off, android is going to be alot different than the iphone OS, no doubt about it. Android also doesnt have as big of a market, so they are not going to have as many apps/games. However it makes up for this in the quality of the apps (100+ times better than the app store's) and the amount of customization overall. Very soon, the market is going to explode with apps though. Alot of people are predicting the android market to overtake the app store in 2010.
But to answer your questions straight forward:
Is android's app store just as good?
-IMO yes, if not better overall
Are there as many games?
-No, but more games are coming soon. Just youtube "Raging Thunder 2" The first to start using the Droid's high res screen
Is Nazi Zombies or AC-130
Spectre gunship on it?
-No.
Can you jailbreak?
-Its called "rooting", but yes. But you will find you can do the same amount as a jailbroken ipod or iphone on the origional android os.
Can you get free apps?
-Google it. If you get the droid, you can actually voice google it