I am biased, but Linda Coleman is the best. She has her own blog at <a href="http://www.biztaxtalk.com" rel="nofollow">http://www.biztaxtalk.com</a> and her email is lgc@possibility.com. On her blog she talks about tax issues and answers any and all questions for free. You can get a good feel for yourself that she knows what she's talking about just by reading the blog. Also, she is a former programmer and has many software clients, so she is very familiar with the space.