one of my sites have vanished from google...what do i do????

Judging by the sites that are in your signature, I would say that your site has been placed in the supplemental results due to a total lack of unique content...

Hi Derek,

Ok, many factors could be involved here, I have checked the site on the whois registery and have found that it was only created on the 28th Oct 2010, this is an extremely new domain and the likely answer is the Google dance, this can sometimes last for up to 6 months.

Google needs to build up trust with a website before it gives it one steady ranking position and often it will remove the page completely from the index.

I have also checked and Google has not completely removed your site from their index, possibly just devalued it's ranking and thus you can't see it in the search.

Here are the indexed pages: http://www.google.com.au/search?hl=en&source=hp&q=site%3Adehumidifiersforho mereviews.net&aq=f&aqi=&aql=&oq=&gs_rfai=

My advice would be to keep backlinking to it from quality pages and you will soon see it start to steady out and rank higher. Just keep persisting with it.

This is the nature of SEO on a new website, it may dissapear for days or weeks at a time, then you might see it climbing page 2 for an entire month before jumping down to page 5 etc. Just keep persisting and your efforts will pay off over time.

Cheers,
Dave

Just continue whatever you are doing. If you've got all unique content then you should be better off than most. If you've been building links you should increase your pace if possible and you'll see favorable rankings soon enough.

It's a new site - so you have to be patient.

Also - don't forget about other search engines. You can also do some article marketing with it linking back to your websites.

See if you are still indexed by searching for your domain. But the simple straightforward answer is, wait.

I know the feeling. Let's just say that one of my blogs that brings in 50% of my sales has danced away from the top page. It was on the top page for at least 1 month. I was getting a ton of Christmas traffic. Now ALL the keywords are dancing. I am so ticked off in a way, but I guess this is part of the business.