Google has their own schedule and rules to list pages and images.
We know GoogleBot has checked ALL pages and images (we keep track of all visits in our database).
Last week they reindexed all pages and now we have 37,300 listed pages (we had only ~700 pages before).
Number of images has not been changed since Feb, I think.
It is a matter of time and popularity index.
We had 31,000 images listed by
www.live.com. We lost ~17,000 when we changed old thumbs to new ones (with a bigger watermark), but ~13,000 are still alive.
We are working to increase these numbers.
Thank you!