The subject of public's interest in UFOs is important and I tried to start such a discussion in "The UFO forum" a few moinths ago. As I wrote in the past, the public seems to have a curiosity in UFOs, but overall interest is very superficial.
Thanks to RonCollins for providing the Google Insights / Trends links. In fact, I had checked the Google Insights / Trends statistics of UFO-related search terms as soon as those Google services became available. And looking at the current Google stats, I don't see any change of trend vs a year ago.
Note: The Google numbers are "normalized" (i.e. relative to all Web searches) but one can add other search terms on the same graph, to get a feeling of relative popularity of the two terms (on the Google Insights graph of "ufo" try adding any celebrity like "megan fox"). Btw I also had absolute numbers from the web logs of a couple of top-ranking UFO-related Websites.
Last weekend (Saturday)
MSN.com homepage prominently featured a photo of the recent "Norway 'UFO' spiral" and had a link to Bing.com for "Best UFO videos" which in turn led several thousands of visitors to my UFO documentaries webpage. My conclusion is that most people will view a UFO story if it is put in front of them, but in the same way they'd view any "bizzare" story, but will lose interest very quickly.
---------- Post added at 06:50 PM ---------- Previous post was at 06:11 PM ----------
Looking at the Google Insights graph for UFO in USA from 2004-today, there are several "traffic spikes" in 1Q of 2005, 2007 and 2008 and 2Q-2004.
I would guess the most recent three traffic spikes were caused by the Stephenville TX (Jan-2008), the O'Hare airport (Nov-2006 but first publicized in 1-Jan-2007 in Chicago Tribune) and the much hyped ABC Peter Jennings UFO Special "Seeing is believing" television broadcast in Feb-2005 respectively.
Finally, I looks like the 2Q-2004 Google traffic spike for UFO was due to the Mexico FLIR ("oil well flares") incident in May-2004. It caused the highest spike in Google search traffic for "UFO" (and more so for "UFO video"), probably because the video of the incident was shown on TV many times and the incident involved military aircraft and crew.
Contrast those traffic spikes with the release of various countries' UFO files (Britain, Canada, Brazil, Denmark etc), the Nov-2007 NPC "UFO close encounters" press-conference, the airing of various TV documentaries, CNN Larry King shows on UFOs etc.