I also would like to get into some form of typing/writing/data entry work to earn extra money. Thank you for putting this question out here as it has provided me with some valuable answers too! Also, there is a nationally syndicated talk show host called Clark Howard. If you go to his website
ClarkHoward.com Home: Save More, Spend Less and Avoid Rip-Offs on clarkhoward.com (I think) he does have a section dealing with legitimate work at home links. Some of them may be writing jobs. Not sure. Someone else told me about
Work at Home Jobs: Free Legitimate Work From Home Job Opportunities. I'll be honest and say it has not been very beneficial to me, but that doesn't mean it won't help someone else. Good luck!
Susan