I guess you can mark me as "undecided" - I like the idea in theory, and to be sure I have gotten some good information from fellow board members. But I'm a little concerned for a couple of reasons..
First, technical writing is difficult at the best of times. One has to have a fairly good idea as to level of proficiency of the intended audience. And obviously the level of experience amongst readers varies tremendously.
Secondly, I really wouldn't recommend that anyone do much in the way of serious modification or service work without having a copy of the Service Manual readily to hand. The Harley shop manual is far from perfect, but it is obviously a professionally written, fact-checked, illustrated, and edited publication. Its also useful to have it open on your workbench when you are doing something unfamiliar. A "How-to" section therefore should augment rather than replace the Shop Manual for all but the simplest tasks.
Thirdly, (and this is the toughest part) - I have in the past read "how-to's" that suggest or recommend practices that IMHO are at best likely to result in risk to your bike, and at worst are downright dangerous. Who takes the responsibility for removing or editing posts containing misleading or incorrect information? If the board is moderated, then it is possible that the board operators or moderators could be found liable for negligence in allowing dangerous information to be disseminated. This could to a certain extent be covered by the use of disclaimers and waivers. But it still needs thinking about.
Lastly, there are some tasks that just should not be attempted by anyone who is not an experienced mechanic. As an example, checking the valves (as part of the 10K) service, is not the sort of job that I would recommend to anyone who has not done this sort of work before. If you want to learn how to do this, I'd recommend taking a class at a technical college etc., or buy a $400 Honda to practice on, rather than risking destroying your $8000 Revolution engine. Its fine for guys who've been tearing engines apart for years to say "it's real easy, and I saved myself $500, etc." - but they need to remember that not everyone who reads their words will be so experienced. Sure- the technicians at your local Harley shop may not be perfect - but chances are they are a heck of a lot more proficient than the typical accountant or saleman who wants to work on his V-Rod.