I finished it. Well, what was there of it. ★★★★★
This is Taara. This is most certainly not Tom. And this is a totally awesome story! (AVPM? Anyone? Anyone? No?) Okay, so the story is told through a series of puzzles. I believe that the most recent chapter is 3.2.1 (I forgot how the numbering system works, but I think there are at least twenty-odd chapters right now.) Unfortunately, the most recent chapter was uploaded ten months ago. John Green says that he wants to continue the project, but he's a little busy right now.
Right, so thisisnottom is not, in fact, about anyone named Tom (at least as far as I can tell). It's about a girl whose name I can recall (but if I recall correctly, she can't recall her name any more than I can) who is apparently an escapee from an underground computer system that uses people as a power source.
I'd love to say more, but it's a bit complex, and it'll ruin the fun. This story, as I said, is locked behind a series of puzzles. Unfortunately, the puzzles are varied and highly complicated, so it's pretty much impossible to get to all the chapters without crowd-sourcing. One of the tacitly acknowledged "rules" of thisisnottom is "never reveal the answer." The Internet, however, will provide you with a series of hints. Best of luck, you guys.
Hint 1: What's missing from the sentence?