C-SPAN is sponsoring another giveway to social studies teachers, including homeschoolers. They are giving away one free Electoral College Map poster to any teacher in the continental US who requests one (at least until supplies run out). I haven't received mine yet, but the previous ones I've gotten have been BIG and printed on thick, high-quality paper. So it should last you through the 2012 elections, which is its intended use.
The map reflects the 2010 census figures, and also includes some Election 2012 dates as well as some historic results. So it should generate a good deal of discussion on its own.
However, C-SPAN has also developed some free lesson plans to accompany the map. On their website, you can download such resources as Electoral College Map Poster Activities, and lesson plans on The Electoral College and the Constitution and Pros/Cons and Alternatives. The lessons include video clips of current political figures debating the issue, which helps makes the topic current.
I plan to do a lot of education around the 2012 elections in the coming year, so this is a great resource for us. I hope it may be helpful to you as well.