dartagnan wrote -
to convert your JAR ppl to FAA, all you have to do is to go to an FSDO(call them for an interview), and they will issue same day a validation.
and it's FREE!
That is incorrect. You need to follow the correct procedure to be able to fly over in the states on a foriegn license. Search on here to find the correct process. If you turn up at a FSDO unannounced expecting to get a temporary airmans certificate from them, you'll have a long flight back to Europe.