I'd be up for developing and hosting (at the start, not sure how well my shared hosting would hold up) a site for tech archives. Compiling the articles on there into a PDF every month or so probably won't be too hard, although PDF generation libraries aren't all that easy to come by (unless you pay silly amounts of money). A website is easy to search, and writing a good search really isn't all that hard if you know what features to use (well, English-language search anyway...).
The problem there is - it isn't this forum anymore, which I value greatly, and I don't have nearly enough time to have it finished anytime soon. Also, who's going to write and edit the articles? Wikis need a lot of moderation, and everyone knows allowing every idiot out there to write tech articles could have some pretty bad outcomes. Of course rating systems could solve this, but that's another discussion.
PDFs may be 'bloaty', but it's one of the few formats that can properly handle cross-platform formatting. The only PDFs I've encountered that aren't searchable are those containing only pictures.
I think the best way is to let the end user decide the format, and different formats are offered - PDF (downloadable and relatively easy to search), online (easy to search), downloadable (but hard to search) website, ...
I'm just throwing out ideas here, no clue if they're the right ones. The biggest problem with getting a content-based site launched is having actual content. In comparison the rest is fairly trivial.