Google Suggest has already been detecting misspellings and showing suggestions that include the properly spelled keywords, but now the mistakes are easier to spot. If you type a misspelled query, Google Suggest includes the "did you mean" label.
"These spelling suggestions already exist on the results page, but by moving them to an earlier point in the search process, we hope we've made it faster and easier to get to the results you're looking for. Right now, this feature is offered only for google.com in English, but we're working to roll this out internationally in the near future," explains Google.
A Wall Street Journal article listed some of the most commonly misspelled words in Google and other search engines: "Criagslist" instead of "Craigslist", "Facebok" instead of "Facebook", "definately", "definetly" or "definatly" instead of "definitely", "stilletos" or "stillettos" instead of "stilettos", "mischevious" and "mischievious" instead of "mischievous". Yahoo's most misspelled word of 2010 so far was Eyjafjallajokull, the famous volcano in Iceland that erupted this year.