Google Dev Channel builds now offer web powered spell check suggestions optionally
Google has delivered the enhanced spell checking powered by their search engine in Chrome.
It is available in the Dev Channel edition of Chrome and has to be enabled manually.
This one would use the Google Search to find out a possible correct spelling for a mistyped word in text boxes on web pages.
Chrome adds the suggestion at the bottom of the list displayed in the context menu.
This comes handy for words that are well known but are not part of popular dictionaries.