I had never heard of this, though it seems to have been around for a little while.
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The following may be of interest to you or someone you know:

If you are active or reserve military, and your service was extended under stop loss between September 11, 2001 and September 30, 2009, you're eligible for $500 per month in retroactive pay. Veterans and beneficiaries of servicemembers are also eligible.

Learn more about retroactive stop loss pay and find out how to apply http://www.defense.gov/home/features/2010/0710_stoploss. If you're eligible, you must submit a claim by October 21, 2012.
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Looks legit.

USMCFLYR

I believe this mainly targets enlisted members. Officers are SOL because we don't have a specific ETS. We do however have the opportunity to hook our former soldiers/airmen/etc up because the military has not done a good job of getting the word out to those who have moved on. If you stay in contact with enlisted you served with, let them know.

That is pretty much the case. Additionally, if you were enlisted AND recieved any kind of bonus either prior to or after being stop lossed you are ineligeable for the bonus.

Applies to O's as well - I was kept 6 months after my UPT contract - they paid up, would have much rather separated on time instead but hey ny 6 months of pain took the kids to see the orlando mouse