Alright, I read through the overview, and found a few things that bugged me in it.
The opening paragraph felt way too fluffy, like the opening to a fiction novel rather than a dry presentation of information, like what it seems you guys are aiming for. In fact, I'd go as far as to say one should simply dispense with the mystical viewpoint beyond a sentence to say it exists, and make it clear that this site is dedicated to the psychological view. One can look anywhere and see the mystical view of tulpa, I don't think going into any detail in it here is necessary.
Next is the suggestion of the irc. As a concept, this isn't a problem at all and should functionally work to keep people from asking simple questions over and over on the forums. But, the problem I have is that the current state of the IRC isn't really that welcoming to newfolk, not because of it being abrasive, but because many of the younger users have latched onto it as a hangout spot, and there are many times when I myself have come into the room and witnessed conversations about anything BUT tulpa. There were even times when I would just see floods of spam and nonsense, even when people were pointed to the appropriate IRC rooms for that sort of thing. While I don't think that the IRC should never diverge, or that it will never diverge from the topic, I also think that with this current flood of new users moderation on the chatroom needs to be much more strict, and punishment given a bit more liberally to those who break rules.
Next: the sections "The hands of the Clock" and "Are the really there". Frankly, in the aim to create a completely unbiased and fact only guide, these shouldn't be here. While I agree with faith being a good thing for tulpa, and that hour counts tend to make people compare their progress to others, which actually is something that shouldn't be done, these two blocks shouldn't be in a general, unbiased guide, as this is a biased viewpoint beyond the basics of tulpa creation. This information can be provided in some parts of the forum as a personal suggestion, since it does seem to work for some, but putting it in a general guide that's supposed to be unbiased is dishonest.
The mention of MLP is unnecessary, and believe it or not people will likely be turned off if the see it. It's not rational...but we of all people should know that people aren't always that rational.
Those are my opinions on things right now. I'll likely come back with some more suggestions as I re-read it again. I think much of this is solid, but it's important to stay as neutral as possible. We should only provide the basics in this overview, and have the other guides still available for people who want to go into more detail.