I've got a number 1-1000. I will allow
10 people to each guess one time by replying to this thread. If you guess the number, I'll send you 0.1 BTC.
For proof, here's a hash which contains my number (and some other characters to prevent brute forcing).
9a52486ec6b39cd0cf036954621843b0da87cf0cb36aedd8317e10593641129f
EDIT: 100 guesses, please don't use more than a few guesses per person.
Guesses so far (as of 3:43 PM EST 06-28 / 8:43 PM GMT 06-28):
726 457 333 21 834 942 678 712 936 814 7
428 1000 725 787 216 12 968 222 939 830
777 696 420 57 832 16 999 444 747 913
617 463 42 682 654 317 278 709 18 2
379 119 911 593 131 505 640 459 101 428
1 69 98 697 921 520 192 288 741 128
456 666 888 23 105 58 64 831 857 882
39 111 7 137 821 59 99 424 19 942
115 816 180 88 314 60 491 715 145 632
621 123 369 67 628 119 255 8 212 258