Both iOS 7.0.1 and 7.0.2 have shown up in analytics reports, although those reports are notoriously easy to fool. But, BGR has gotten its hands on an actual iOS 7.0.1 update. Unfortunately, there is no word on what fixes had to be pushed to iOS 7.0.1 and couldn't be taken care of during the three months that iOS 7 was in beta.
As for iOS 7.1, the assumption is that it will be a bigger update, and that it will be announced as part of the iPad event that is expected to happen sometime next month. There will be an iPad 5 and an iPad mini 2, and maybe more on iOS 7.1 then. But, we'll have to wait and see.