I do my own... (duh, I'm an accountant). Cheapest way for most people is to go to www.irs.gov and follow the links for "Free File". Most people can e-file their federal for free and then pay $9-12 for state which is a great deal.

I used to do friends and family taxes but I try not to do too many anymore because it got to where I had more and more people asking while I was working 70 hours a week. I'm (finally) out of public accounting now but I don't feel like bothering with it. Though I probably give about 50 hours worth of tax advice on various forums each year. After 7 years of accounting, I'm used to it.