ITU, the International Telecommunication Union, says the worldwide number of subscriptions were 6 billion at the end of last year (i.e. 2011). As a comparison, at the end of 2010 there were 1 billion less. The number of people was 7 billion+.
In my household of 4 people we have 3 subscriptions. While I think that's quite a lot, we're still being beaten by the world as a whole :-)
Some other news:
iPad mini will probably be released on October 23rd, according to AllThingsD. According to a leaked inventory from the german retailer MediaMarkt the cheapest model will cost €249, which will have WiFi and 8GB persistent storage, but not cellular. The WiFi + cellular and larger memory models will cost more, so the most expensive model will cost upwards of €650.
Apple has licensed the Swiss railway clock in iOS6. The reason is that Apple was approached by SBB after they found out the iOS6 clock looks remarkably like their clock. There's not supposed to be a lot of money involved in the deal, but the Swiss want some credit.