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It was a 10 page static HTML page website. 3 year old, PR2.

Monday night, copied a WordPress from somewhere to this website's public_html folder and activate it.

The home page was "index.html" before switching to WordPress. Now this html file (index.html) has been deleted, so WordPress' Home page can work.

All other 9 static html pages are still there in Google index.

Just notice it today that the home page URL disappears in Google completely. Why?

All other 9 static html pages' URL are still in Google.

robots.txt is Allow: /

What may have gone wrong to remove the home domain URL from Google index?

Thank you for your help!

Wow, that IS good! I like the free copy of Declaration of Independence etc. idea a lot

There is a translation company behind the website and the targeted audiences are people who need professional services to translate their documents / websites accurately.

I like the free translation tool idea as well - to get some browers' traffic - hopefully pick up some buyers from there. It is actually not too difficuilt or expensive to produce. We could use Google Translate API if they did not shut it down, but I believe there are other API available.

Based on your suggestion, we are going to offer webmasters free translation copies of their important web pages right away. Do you have any suggestions where to fish? (for high quality websites) We need to find webmasters who are honest and will keep their words to put up our links on their pages. I mean people could have taken our translation and NOT add our links there - and we can not do anything about it if that happens.

The cost to translate a typial web page is $30~$50. So if we can get a permanent link on a deep subpage of a quality website, it is worth to do it, is that right?. The big assumption is the our link will be put up there and will stay there as long as the page exists.

For this particular case, it is a typical translation service provider - nothing for people crazy about.

But you check list inpires me on the next project I will pick up. I will pin your list on my office wall, and read it a few times every day  

Thank you!

Thank you EGOL! As a guru, you may set your goal as #1 postion. For us, top 10 or even top 20 positions could make us happy,**  simply because**: about  50% of the top 10 websites listed on Google for those  keywords in my question are  automatic translation tools. When a visitor looks for professional translation services, he has to scroll down the ranking page  to find a real company to do that for him,  even go to the second ranking page for that.

Can you offer some advices on that case -- strategies to rank for  top 10-20 for 70% difficulty keywords? Now the website (6 months old) is ranked between postion #80 to #120 for those competitive keyword phrases.

Great advices!

When you look for some less competitive phrases, do you have a upper limit when you do that? Say 50%, 40% or 30% difficuilty at  max to start with a generally new website? (new = a few months old)

I did a quick search in SEOmoz keyword difficuilty tool and found out most of the keyword I pick with some nice traffic are all 70%. Keyword list:  http://screencast.com/t/Y4pPK42ZXrST

How "difficult" is 70%?

If someone ask you to optimize and rank a (very) new website for a keyword with 70% difficulty:

Will you take the challedge or you think mission impossible? Why? How do you relate this reletively abstract "number" to the real world?

Thank you!