A recent Chromium build added Instant Search to the Options dialog, but the feature is disabled by default. Here’s the official description:
While instant search is useful for frequently visited pages (for example, you only need to type “m” to load Gmail), the feature doesn’t work well if you want to type a new web address or a query. If you frequently type Gmail’s address, but now you want to go to http://mail.yahoo.com, Chrome will first load Gmail and then Yahoo Mail.
Chrome Labs includes many other experimental features: side tabs, tabbed options, remoting support, disabling outdated plug-ins, XSS auditor, background web apps, proxy for Cloud Print and GPU accelerated Canvas 2D. Most of the features can be enabled in Chrome Dev Channel if you type about:labs in the address bar.