Google index drop

Hi Google Experts.

I'm hoping to get some insight in the amount of pages indexed by Google.

I run a new download site, and not many days ago we had over 600 indexed pages. But when I checked last time there was 0 ... but indexed pages on MSN Search, Yahoo!, AlltheWeb and AltaVista had gone up.

When I make the Google search site:ibeat.org it shows 500+

I just wondering if these extremes are normal - and perhaps why Google doesn't increase number of pages at a constant rate?

 

I lost my keyword position, my best guess is google swtiched their datacenter, and my site is new

 

The Google SERP hasn't been altered - for me it's more a question of why the index tools I use show zero...

 

then i m in big trouble, i searched some keywords, usually,i m on the first page, now, i m gone.

 

I have a similar problem, google indexed only the home page of one of my sites. I just dont know why