Although is not yet official, it seems that the iphone 5 is set to go on sell/set to reservations on September 29th. It hasnt yet been set a specific date but the announcement of the new iphone and possibly other new devices will be made on September 7th or September 14th. The iphone is in its last stages of production and it will be produced in bigger numbers soon.
The ipad 3 however it was expected to go on sale this year but that date was pushed, probably will only go on sale on 2012 (this is just my opinion).
(Not my pic - from the source)