Nathan at InsideGoogle reports on a WMW thread about Google testing an interface tweak that offers up a OneBox with links to image results.
Reminds me of something that AskJeeves has done (and I like) for over a year by placing a few images (if the searcher includes a trigger word) from their image database (powered by Picsearch) directly at the top of web search results pages.
For example, a search at AJ for:
+ pictures of Times Square
+ images NASCAR
+ photos watches