Google has long offered its "Did you mean:" spelling corrections and even fixed your slight typos in its auto-completing suggestions. Now Google.com will actively suggest spelling fixes in drop-down suggestions, offering an easy go-to spellcheck tool.
Google won't jump in and fix just any old spelling mistake, though — it only inserts the "Did you mean" suggestions into searches for which it has no matching search. So let's say you want to just use Google to double-check the spelling of a particular word without having to think of a unique search.
The solution? Type a bunch of jibberish after a word. Google won't have a related, commonly typo-ed search, and you'll get the correct spelling right away. For those who trust their browser's own spelling checker, this might not be necessary. For those who need a second opinion, it's a neat trick. It's only active on the actual Google.com page for the moment (and that means US rather than Australian spelling), but should spread to other search boxes soon.