Instant Searches seems to have caught the search developers fancy. Now Try Google Instant Images Search, possibly the fastest way to search Images online.
Google Instant Images Search is created by Michael Hart, a PHP developer, who is using Google API with php and curl and some CDN super caching. [Now the develper has taken the site offline.]
This is close on the heels of Google Instant, Youtube Instant, Twitter Instant … and is possibly better than most other popular image search engines online.