I think a spell-checker is a great idea. Not sure about a grammar checker though because most of the word documents that has a grammar checker is confusing to say the least and most of the time these grammar-checkers find faults in sentences if the sentence lacks any apporpriate punctuation. With the aid of a spell checker overall posting quality should improve a little. In some of the section of the forum we can use all the improvement we can have.
P.S. If you find any spelling mistake in my post, it is because this forum lacks a spell checker.
