..Which provide deprecated info, FYI. Therefore, actually you could have a problem.
Also, they're not interactive sources. I believe the key here should be being interactive. I'm not sure that I'm following the poster's idea, so I'll just proceed with my own views anyway.
People in charge of those files (I'm referring to all help files except mirc.hlp) wouldn't need to update them (IF they update them) everytime whatever changes; instead, the whole community would accurately fill the proposed board and providing lots of examples, which would be much better from any point of view, not only the novice. Who doesn't like examples?
Granted, you'd lose the offline facility of the current help files, but again, even if people prefered any sort of compilation of any further help docs, this one would be easier to obtain, since it'd be behind the whole message board community this time.
My opinion is that mirc.hlp is the only file we need to look after if we're wanting fast answers. It contains mostly syntaxes and the most important remarks around misc features. I could go far away and say I'd prefer it to follow the same idea and suggest to let it be online, but I don't think this would work, since it's way too useful to take the risk of not being available offline.
The other help files, however, contain more paragraphs/texts/articles/whatever (except the command list, obviously, but again it's deprecated); these demand further reading and are much simpler than mirc.hlp. So why not have their concepts here, where info would be always accurate and more examples and opinions could be considered, all available at the same source?