Ok, the first riddle, which was "not trivial, but not difficult either" was successfully answered.
I got fewer answers than I anticipated, but nevertheless:
The article in question is called "Build a 'Single Speed' from the Reject Pile", and is not of huge interest to anyone but those interested in bicycles. An url to the article: http://www.bikemagic.com/news/article.asp?SP=&v=1&UAN=363
That particular article was indeed hard to find, because many links to the original document were erased. In fact, the article was obfuscated.
Having said that, it was much easier to find if one opted to use:
1. Combination of the words (using Google's extended syntax).
2. Additional knowledge about the subject - as one respondent explained ("I added [a search term] "bike" because I could guess the context from the riddle's author :)")
3. Google tends to hide some hits, because it "thinks" that it can tell the "most relevant" results of other. It does, however, provide an option to turn it's tremendous artificially flavoured intelligence: this is the "If you like, you can repeat the search with the omitted results included." link.
4. Google is not the only search engine out there.
So far the champions of the web searching are 314truha
, tied with 3 points each.
Yet there are more interesting results. You see, Google has only one link to the original. It's closest competitor has one link also, but it is a different link. And here is the next riddle.
The article is part of series that KB published somewhere. Yet it is not there anymore. Your quest is to find out: Where the series were (location), how the series were called, and two definitions of "quality" by KB (a citation). A correct answer will give you 3 more points. Bonus point: what are the years of the publishing?