That's pretty much our feeling - our main concern is whether it will pose difficulties for people who don't know much about HTML or CSS. Undoubtedly it will be more difficult for some people, but hopefully we'll have a system that looks better overall and in the end is easier to make significant changes to.
It's hard to say - I expect that 99.9% of browsers support Javascript, but the question remains as to how many are paranoid enough to turn Javascript off. There are, however, sites appearing now that absolutely and completely depend on Javascript - Google Mail being a recent, popular example.
It isn't, but if no one finds the PDF format useful (as opposed to a MS Word .doc, which is how we write it), we can simply distribute the .doc file instead.
This falls into the Tutorials I mentioned - the PDF vs. DOC vs. HTML applies just to the main product manuals, which are currently only distributed as PDF's.
Hopefully Gossamer Update will solve this problem.
I'm not certainly how we could go about making them Dreamweaver-safe - generally most gui editors seem to have problems handling something like:
<input type="radio" name="blah" value="1"<%if checked%> checked<%endif%>>
Some try to correct this (thereby breaking it), others don't display it properly at all.
Gossamer Threads Development Team