I don't know if this issue has been fixed in WP 2.0, I didn't find anything about this on the bugs page but when I tested mail blogging on wp 1.5.2 I used this setence "If this works It's cool" and I got a mysql error : Error... near "'s cool', '--date--'...". I didn't find any addslashes function in wp-mail.php of wp 2.0.