First of all, let me thank all of you people for the response to this post. It's been a great support. I keep an eye on this forum and therefore knew Google is acting as if it were a chameleon, but there are a few things that worried me.
For example, although I do add content--about a page per every three days (yes, during holiday season too)--the bot doesn't index it. My people's traffic has dropped to about 10% of what it was previously with MSN, now most important SE and Google only third place--used to be 1st place. When I look for the keywords I've used to optimize and which reflect what the site has on offer, I used to get #1 to 30 positions depending on the keyword. Now I'm nowhere near those anymore.
In June, when bot-visits and traffic was still high, I decided to use an invisible first paragraph (CSS: display=none) with some sentences (not single words!) describing what the site covers. On each page (well, sort of, some pages duplicated this paragraph) I used a different description with the same message (description of the site's content) in one sentence, and then a bit of an elaborate description of what is on the page (I used more keywords than in the running body text; using them in a journalistic article looks a bit odd to me) in another sentence. I've since (early August) removed these invisible div's as I saw no difference in the SEs that pay attention almost solely to content anyway. Last week, in a futile attempt to get G to visit me again, I have located the HTML-code-and-content of the first paragraph right below the body tag--with the CSS absolute positioning it doesn't make a difference for the visitor anyway (except for the 0.01 percent of older browsers that visit--ah, well, you can't win them all).
Also, it can't be that Google has penalized me, because using the tools7.com pagerank service (I'm on a Mac and haven't the pleasure of running the Google toolbar) tells me my PR is still at 5. My DMOZ listing of two weeks ago doesn't get in either--if it had, I would really be worried sick...
Another thing that strikes me as odd: I've posted an interview that immediately was linked to by 200 other sites. Those 200 inbound links are not reported by Google at all. G reports 19 links only--even without the 200 extra, I should be reported as having 50 inbound links (I follow them up...). For a while I was thinking Google perhaps was now into themes: the interview that I posted was only sideways related to the main topics on the site (it relates to the OS used by the target group).
onedumbear, I will certainly keep you posted of changes in indexing behavior by sticky--a BIG thanks for trying to help me this way!