The PS Vita game dumping tool, known as Vitamin, has just been leaked and is being tested and, so far, confirmed to be legit.
I am personally testing it by dumping one of my game cartridges (Gravity Rush) as we speak and everything looks good so far!
Needless to say, expect a huge surge in PS Vita sales (if you can still find one!) on both new and used units, as well as price hikes in the already notoriously expensive Sony Vita memory cards.
As a side not, please do not attempt to run this tool yourself until developers can confirm it is safe! It -may- brick your device!