I didn't go as far as you did, but I did try to make a few observations.

> However, if you go to the 20,000th post on the forum you'll see that it says 20,000 twice. Add those two together and what do you get? That's right. Also, the 40th post has the number .923 in it. When multiplied by 43,336.9, you get 40,000. Then on the 923rd post, there's the word "six."

On the sixth post, there is a fraction where the numerator is 1 and the denominator is 4. Dead end there, since neither post contains numbers.

> If you break the word up, and assign numbers to each letter based on their position in the alphabet, then add them up, you get 19+9+24, which is 52. Oddly enough, 52 is a number.

#52 contains four numbers.

10: No numbers in that post.
37 (In the post it was 3.7, but 37 will do): contains the number 92.3. That was the post that #40 was in reply to.
70: No numbers in there.
17: Deleted.

Lucky "Didn't try to analyze all the numbers in #40000" Wizard.