Correct - it is 'yet to be built'
Sorry "Hmmm...", but Booger is right:
but what you see 'flying around' on TV is not the JSF. It is merely one of the Lockheed-Martin JSF prototypes that won the fly-off for the JSF program against the Boeing submission. It has a looong way to go before being a commercially viable production aircraft.
Some other aircraft 'flying around' that have yet to obtain Initial Operational Capability (IOC):
F22 Raptor IOC ~ 2005 (YF-22 first flew around 1996?)
Eurofighter [version 1] IOC ~ 2006 (prototype flew ~ 1998?)
Rafale IOC ~2003 (prototype flew ~ 1995?)
There's a big difference between an airframe that flies and an airframe that fights (or performs it's intended role in the case of non-fighter types).