This is ace.
Edit for people who like to point out the obvious:
"Fellow forumites: For those of you who use Safari as your web browser, you may have noticed that one of it's few shortcomings is that it doesn't natively support Google searches directly from the address bar. The above plugin will add said functionality, bringing it's Google-From-The-Address-Bar capabilities more in line with the feature sets found in Chrome, Opera and Firefox."
Can do that with Opera and Firefox natively