|YES, there IS a Teoma Update|
I just checked my Teoma SERPs after looking at them yesterday. Most definitely Teoma has a "dance" period like Google. Today I'm now on page 1 for all of what I have identified as the top 5 search words/terms. I'm now up to positions #1 and #10 for one word, position #3 for 2 other words, position #5 for one search term, and on the last word on the right in the "Resources: links collections for experts and enthusiasts", I'm in the #1 and #3 positions. Much better than where I was yesterday.
As best as I can figure, these seem to be very important in getting a high ranking on Teoma:
#1) Having the key word/phrase in the page title.
#2) Having the key word somewhere in the URL. For example, if you are trying to score high with "widgets", then having a URL like:
likely will give you a major boost.
#3) Keyword density. My site doesn't have a huge amount of inbound links. However, I have carefully arranged to have high keyword density on all these search terms on my home page. One of the search terms I am page 1 on is a *very* common phrase that appears on tons of web pages. I attribute my high ranking to having that both in my page title, and also a high keyword density for it.
Alas, so far all this has got me is one measly hit today from ask.com. Dwarfing the couple dozen or so from Google.
And keyword in meta descriptions.
Its always been a bit of a quagmire, on whether to allow the front page to do all the work, of which a well constructed site could do better. If your base url, is hunting more than the brand name association as well as multiple words / key terms, then i would suggest a rethink on your next build, to expand your keywords across your site, as the few select, that you note, are probably the tip of the iceburg, once you start digging into all the possible connatations individual searchers may use to find what ever it is you are trying to provide or sell.
Teoma, is a themed engine, and its last update proved it without a doubt to me and many others.
The expert resources, got the thumbs up in most cases, with a couple of sparadic, seemingly incomprehensible listings for certain keyterms.
It was a considerable update, but teoma will start trying to get its index up, within its spam filters, to a comparable amount of the likes of GG, ATW, and wisenut.
My point is that you are putting all your eggs in one basket, teoma may turn a switch on and deem your index page as spam, then your gone, again.