I SO disagree.
First of all, you have to have some minimal level of intelligence to use spell check.
Then, you have to have some minimal level of education in the English language to use spell check (for instance, you have to know the difference between there, their, and they're).
Finally, even with spell check and grammar check, you wouldn't believe how many resumes I see that have misspelled words, incomplete sentences and dangling participles.
Spelling and grammar demonstrate competency and are more important now because of e-mail. Using just one instance of Ebonics in an e-mail can cause serious career damage.