https://bitcointalk.org/index.php?topic=1574127.0
An anonymous person with username rekcahxfb (read reverse) is claiming to giveaway 1000 BTC to a random Bitcoin address posted on the thread.
The funds should be moved to another address before block 425000. On that block, anyone will be able to transfer the funds to 1BitcoinEaterAddressDontSendf59kuE address, in which case the amount will be lost forever.
Speculation has it that the funds could be from the infamous inputs.io hack (2013) and the 'random' member will be his alt. Well, that explains why it is a single 1000 BTC giveaway, and not a 1 BTC to 1000 giveaway.
https://bitcointalk.org/index.php?topic=1574270.0