AgreedAs someone who has been directly in charge of hiring, I have to echo the sentiments of prior posters on this thread.
Poor spelling, punctuation, and grammar skills are an immediate rejection for hire in my book. It always strikes me as strange that on a place like the internet where you are judged solely by your communication (rather than other factors like age, sex, race, religion, etc), people seem not to care. Beyond being disrespectful to others participating in a dialogue with you (it tells people they are not worth you taking the time to try and do something right), it demonstrates a lack of self respect.
It is embarrassing how poorly adults (and teenagers) spell, and how lacking in vocabulary people have become. People in the 21st century seem to have this idea that they are so much more evolved than prior generations through history. If communication skills are any yardstick, it would appear that the opposite is true. A regression.
A final thought: People think in words. Therefore, the quality of your thoughts is determined by the quality of your vocabulary.