If you haven't seen it by now, CJ has put together a very nice resource page sharing all the information they're gathering. Commission Junction clearly has some serious resources on this issue, as I know all the networks do, but it is great to see some very visible results of these efforts.

• A US map with CJ's own risk assessment
• A stream of updates on any activity in any state
• You can subscribe to an RSS feed of all updates

You can see from the current map that things are potentially heating up in California, Nevada, Oklahoma, Illinois, Vermont, North Carolina, Florida, and Alabama.

There are many resources available to keep tabs on the Advertising tax. This is a great one.

See the entire resource here.