"This string contains 0.25 BTC hiding in plain sight."
Whoever can first figure out how I have hidden the 0.25 BTC gets it. The 0.25 BTC are waiting for you at 1AJ3vE2NNYW2Jzv3fLwyjKF1LYbZ65Ez64 (just sent it now).
This is real cute but I don't think the puzzle as presented was accurate. The string holds the private key. But you need the private key and the address to spend the bitcoins. The second sentence is necessary to find the bitcoins.
Sam
It actually was not necessary. The address can be computed from the private key. I gave the address to prove the existence of the bounty and as a hint.