I consider myself to be somewhat of a central but right leaning fellow when it comes to the political scene. Somewhat middle of the road on many issues, but I received information about Grassfire.org from a good friend. There you can add your name to petitions that suit you, take part in straw polls, buy yard signs and so on. Whilst I may not agree with some of this conservative organization's stands on some issues, I do find that it is a good answer to blogs such as move on.org.
Check it out... http://www.grassfire.org/index.htm