I just came across a blog post (Missouri Considering Affiliate Nexus Tax Laws) by Matt Enders of mgecom indicating that Missouri could be the next state to consider advertising tax legislation.
A colleague of mine owns an online retail website based in North Carolina. Just today, he received a letter in the mail from the State of Missouri questioning him specifically about his affiliate program as it pertains to Missouri residents. He was kind enough to share this letter with me.
Read the letter from the state of Missouri.
More details at http://www.mgecom.com/affiliateblog/corporate-news/missouri-considering-affiliate-nexus-tax-laws/.