Where is the Facebook Campaign for Health Care Reform?

NetCentric Advocacy picks up on something interesting. Mentions of the term "health care" on Facebook are currently at one of the lowest points since the final weeks of the election. In short, there is no campaign for reform happening on one of the biggest social networks in the country. The following chart shows the number of mentions of the phrase "health care" on Facebook wall posts over the last 12 months:

Facebook Lexicon, which produced the graphs, doesn't show the exact number of mentions. Rather, this is just a relative comparison of the popularity of the term over time. Still, the number of mentions is significantly smaller than during the election, particularly during the peak in November of 2008.

So what's going on here? Why does it seem like there is no activity on this topic online? Is this a failure of measurement? The lexicon results do end around mid-July, so it is possible that we're just not registering a huge surge in interest happening right now. Or is this a failure of organizing?