I reported in an earlier post on August 9, 2010, that the Multistate Tax Commission (MTC) was in the beginning stages of creating a Model Sales and Use Tax Notice and Reporting statute which follows Colorado's and Oklahoma's recent legislation.
Now, the MTC has released a draft of the Model Act as they work their way through the process. The draft Act includes annual notice requirements to purchasers and the state. It also includes provisions for assessment of penalties for noncompliance.
The question remains as to whether these requirements are Constitutional. However, as the MTC works through this process, I would not be surprised to see other states adopt legislation similar to Colorado's or Oklahoma's.
If you are a remote retailer and do not currently collect sales tax in multiple states, you may want to analyze your notice requirements and proactively prepare.