The FEC has proposed to apply campaign finance rules to online speech. The FEC comment period ends tonight.
The proposed rule regulates what you can say on personal web pages and blogs, what advertisements you can carry (whether or not you control the ads), what sites you can link to, and many other common activities.
The Center for Democracy and Technology has a page on the subject, a brief survey about online speech, and a statement of principles which you can sign.
If this matters to you, please consider signing CDT’s statement of principles.