You launch your favorite search engine and enter a term or two.  Then near the top, the search engine helpfully suggests a possible alternate query, at which point you scratch your head and say "wha?" (or perhaps something more vulgar.)

You think you can do a better job?  Now's your chance to prove it — Introducing the Speller Challenge!  Win cash prizes!

Mosey on to http://spellerchallenge.com and get a head start.  The contest officially opens January 2011.